This statistics video tutorial explains how to find the z-score that will be used to find the confidence interval and margin of error for a population mean. This video contains 2 example problems in which you're asked to find a 90% and 95% confidence interval given the population standard deviation, sample mean, and sample size. By the way, the margin of error is also known as the error bound. This video also explains the difference between the confidence interval and the confidence level. It also discusses the meaning of the greek symbol alpha as it is used in this context.

Introduction to Statistics:
https://www.youtube.com/watch?v=XZo4xyJXCak

Introduction to Probability:
https://www.youtube.com/watch?v=SkidyDQuupA

Central Limit Theorem:
https://www.youtube.com/watch?v=4YLtvNeRIrg

Standard Error of The Mean:
https://www.youtube.com/watch?v=UuHqq09nTAk

_____________________________________
Confidence Intervals & Margin of Error:
https://www.youtube.com/watch?v=DT-fPG0Hff8

Find The Z-Score Given Confidence Interval:
https://www.youtube.com/watch?v=sJyZ9vRhP7o

How To Calculate The Sample Size:
https://www.youtube.com/watch?v=nkkxu09K3ZA

Student's T-Distribution:
https://www.youtube.com/watch?v=MUD390jtgQs

Confidence Interval-Population Proportion:
https://www.youtube.com/watch?v=_aQTgv_OOSU

Chebyshev's Theorem:
https://www.youtube.com/watch?v=ZXq0ygaZuwg

_____________________________________
Hypothesis Testing - Null & Alternative:
https://www.youtube.com/watch?v=wiYJWyfdGg4

Type I and Type II Errors:
https://www.youtube.com/watch?v=9yQm9F2_yIk

One Tailed and Two Tailed Tests:
https://www.youtube.com/watch?v=XHPIEp-3yC0

Test Static For Means & Pop Proportions:
https://www.youtube.com/watch?v=Hag0GW9B6EY

Hypothesis Testing Problems:
https://www.youtube.com/watch?v=zJ8e_wAWUzE

____________________________________
Final Exams and Video Playlists:
https://www.video-tutor.net/

Full-Length Videos and Worksheets:
https://www.patreon.com/MathSc....ienceTutor/collectio

This physics video tutorial provides a basic introduction into PV diagrams. It explains how to calculate the work done by a gas for an isobaric process, isochoric process, isothermal process, and an adiabatic process. It also explains how to calculate work done for a cyclic process. This video explains how to calculate the work performed by the gas given pressure and volume values in units of Pa and m^3 as well as atm and L. The first problem explains how to calculate work done during an isobaric expansion and the second problem discusses the work done for an isochoric compression. This thermodynamics video tutorial contains many examples and practice problems.

Open Vs Closed Vs Isolated System:
https://www.youtube.com/watch?v=TFP6SvWPOQc

First Law of Thermodynamics:
https://www.youtube.com/watch?v=7Siv2NNCFag

Isobaric Process:
https://www.youtube.com/watch?v=BG-cUpnNmPM

Isochoric Process:
https://www.youtube.com/watch?v=SxfgHdfKjQA

Isothermal Process:
https://www.youtube.com/watch?v=m9h6qyWLscs

Internal Energy of an Ideal Gas:
https://www.youtube.com/watch?v=k3rJs_ioTHc

_________________________
Adiabatic Process:
https://www.youtube.com/watch?v=gaZmZjBtgAM

Thermodynamics Review:
https://www.youtube.com/watch?v=TnDCxw0y6YM

2nd Law of Thermodynamics:
https://www.youtube.com/watch?v=DWiCaDPM7Hk

Heat Engines:
https://www.youtube.com/watch?v=O7TSo_up1Dw

Converting Heat Into Electricity:
https://www.youtube.com/watch?v=LX2cU27kUUc

________________________
Carnot Cycle:
https://www.youtube.com/watch?v=Qi3m9sD5w-A

Otto Cycle:
https://www.youtube.com/watch?v=vAeMmSRdQYY

Refrigerators and Heat Pumps:
https://www.youtube.com/watch?v=sKfgz6JLQRI

Entropy:
https://www.youtube.com/watch?v=Bdn3u2OHvKE

Heat Engines and Refrigerators Review:
https://www.youtube.com/watch?v=QBd2zraOe2k

Physics PDF Worksheets:
https://www.video-tutor.net/ph....ysics-basic-introduc

Faction: The Indian Army

The First World War
When the war broke out in 1914 there was growing political unrest in India against British rule.

Germany had even tried to stir up anti-british movements and rebellion.

However such fears were put to rest when India rallied to Britain’s cause. It was believed that India’s proposal of independence could best be served this way.

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Get your copy of Simple History: World War I today!

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Simple history gives you the facts, simple!

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Credit:

Narrator:

Chris Kane

https://ckvox.com/

Animation:
Daniel Turner

Artwork:
Daniel turner

Weapons research :
Mike Edge

Music Credit

Ross Bugden- 'Drive'

‘Creative Commons Attribution 4.0 International License’.

Pictures: Wikimedia Commons (Public Domain)

Though the bow has been used in warfare for thousands of years, it was not until the 14th century with the appearance of the longbow did it become for a while the supreme and dominant force on the battlefield of Europe, especially in the hands of the English and their Welsh subjects.

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Credit:
Created by Daniel Turner

Script: Conan White

Narrator:

Chris Kane
https://vocalforge.com/

Music Credit:
Lord of the Land by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/r....oyalty-free/index.ht
Artist: http://incompetech.com/

Sources:

War Bows: Longbow, crossbow, composite bow and Japanese yumi
By Mike Loades
Military Archery in the Seventeenth Century
By E.T. Fox
Military Transition in Early Modern Asia, 1400-1750: Cavalry, Guns, Government And Ships
by Kaushik Roy

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Support us on Patreon: https://www.patreon.com/simplehistory

The Oregon Trail, was a path traveled by hundreds of thousands, extending over 2,000 miles across the unsettled American frontier from the Missouri River to Oregon City,

Copyright: DO NOT translate and re-upload our content on Youtube or other social media.

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Credit:
Created by Daniel Turner

Narrator:


Bryan 'Lazlo' Beauregard

Sources:
https://pastebin.com/RNjVKpim

Download Warpath using our link, and play the new sniper update: https://bit.ly/3vp4vJV
Register to the tournament and win up to up to $15,000 in prizes: https://brothersunite-warpath.....lilith.com/?media=ko

Pavlov’s House
The stronghold of the 13th Guards was located at the bombed out NKVD headquarters, a soviet government law enforcement agency. From this location, the troops resisted the initial German assault and took to improving their defensive position. On September 25th, the commander of the 42nd Guards Rifle Regiment ordered the men of his 3rd Rifle Battalion to capture two buildings that seemed like a good position for setting up a defense against German attacks. Junior Sergeant Yakov Fedotovich Pavlov of the 13th Guards Rifle Division was tasked with seizing one of the buildings at the edge of the 9th January Square. On September 27th, followed by three soldiers from his squad, Pavlov entered the building under the cover of night and drove the defending Germans out of it. Once in their hands, the commander of the 42nd regiment designated it “Pavlov’s House”.



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Credit:
Created by Daniel Turner (B.A. (Hons) in History, University College London)
Script: Dejan Milivojevic
Narrator:

Chris Kane
https://vocalforge.com/

Sources:
Antill, Peter D., and Peter Dennis. Stalingrad 1942. Osprey Pub., 2007.
Roberts, Geoffrey. Victory at Stalingrad the Battle That Changed History. Longman, 2002.
Walsh, Stephen. Stalingrad 1942-1943: The Infernal Cauldron. Simon & Schuster, 2000.

Come join the battle by downloading World of Warships Legends now! https://wo.ws/38avbSC


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Credit:
Created by Daniel Turner (B.A. (Hons) in History, University College London)
Script: Conan White
Narrator:

Chris Kane
https://vocalforge.com/

Animation: Maja Djokic

Download March of Empires for free here! https://gmlft.co/simplehistory

The attack on Fort Vaux showed no importance for the final outcome of the Battle of Verdun.
Yet the bravery of the fort defenders would make the battle famous.

Become a Simple History member: https://www.youtube.com/simplehistory/join
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Copyright: DO NOT translate and re-upload our content on Youtube or other social media.

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Credit:
Created by Daniel Turner
Script: Dejan Milivojevic
Narrator:

Chris Kane
https://vocalforge.com/




Sources:
Clayton Donnell, Fortifications of Verdun 1874-1917, Osprey Publishing Limited, 2011
Holstein, Christina, Fort Vaux, Pen & Sword Military, 2011
H. W. Kaufmann, J. E. Kaufmann, Verdun 1916: The Renaissance of the Fortress, Pen & Sword Military, 2016

#shorts

2nd Channel: https://www.youtube.com/channe....l/UCPdc6bs3I8s6Y4QE_
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T-Shirts

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Credit:
Created by Daniel Turner (B.A. (Hons) in History, University College London)

The vowel i can make a short /ĭ/ sound or a long /ī/ sound. Learn about the vowel i with Reya the Red Panda from Khan Academy Kids!

Visit us at http://www.khankids.org to learn more about Khan Academy Kids, a free educational app for preschool through 2nd grade.

Available on Google Play, Apple, and Amazon app stores:
➡️ http://khan.co/KhanKids-YT-Google
➡️ http://khan.co/KhanKids-YT-Apple
➡️ http://khan.co/KhanKids-YT-Amazon

You can also access other videos on vowels and vowel teams on our Vowels and Vowel Teams playlist here: http://khan.co/KhanKids-Vowels.

Subscribe to our channel for more videos like this.

We've heard many questions from parents about balancing learning, play, time outdoors, and the whoosh of everyday life with small children (ages 2-7). Khan Academy Kids invited early childhood expert and founder of Tinkergarten Meghan Fitzgerald to join us for this webinar. We discuss best practices, share activities that foster independent, hands-on learning for young children, and answer audience Q&A.

You can view the webinar slides here: https://bit.ly/KhanKidsTinkergartenWebinar

Learn more about Khan Academy Kids, our free educational app for children ages 2-7 at http://www.khankids.org.

Available on Apple, Google Play, and Amazon app stores:
http://khan.co/KhanKids-YT-Google
http://khan.co/KhanKids-YT-Apple
http://khan.co/KhanKids-YT-Amazon

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/cc-sixth-grade-ma

Learn how to read histograms, which summarize data by sorting it into buckets.

Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/histograms/e/creating-histograms?utm_source=YT&utm_medium=Desc&utm_campaign=6thgrade

Watch the next lesson: https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/mean-and-median/v/statistics-intro-mean-median-and-mode?utm_source=YT&utm_medium=Desc&utm_campaign=6thgrade

Missed the previous lesson? https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/histograms/v/histograms-intro?utm_source=YT&utm_medium=Desc&utm_campaign=6thgrade

Grade 6th on Khan Academy: By the 6th grade, you're becoming a sophisticated mathemagician. You'll be able to add, subtract, multiply, and divide any non-negative numbers (including decimals and fractions) that any grumpy ogre throws at you. Mind-blowing ideas like exponents (you saw these briefly in the 5th grade), ratios, percents, negative numbers, and variable expressions will start being in your comfort zone. Most importantly, the algebraic side of mathematics is a whole new kind of fun! And if that is not enough, we are going to continue with our understanding of ideas like the coordinate plane (from 5th grade) and area while beginning to derive meaning from data! (Content was selected for this grade level based on a typical curriculum in the United States.)

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy à ªs 6th grade channel:
https://www.youtube.com/channe....l/UCnif494Ay2S-PuYlD
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/algebra-home/alg-


Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway. You're the airplane and algebra is your sunny vacation destination. Without the runway you're not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We're about to take off!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to KhanAcademy’s Pre-Algebra channel:: https://www.youtube.com/channe....l/UCIMlYkATtXOFswVoC
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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ec....onomics-finance-doma

Factors that might shift aggregate demand

Watch the next lesson: https://www.khanacademy.org/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/aggregate-supply-demand-tut/v/long-run-aggregate-supply?utm_source=YT&utm_medium=Desc&utm_campaign=macroeconomics

Missed the previous lesson? https://www.khanacademy.org/economics-finance-domain/macroeconomics/aggregate-supply-demand-topic/aggregate-supply-demand-tut/v/aggregate-demand?utm_source=YT&utm_medium=Desc&utm_campaign=macroeconomics

Macroeconomics on Khan Academy: Topics covered in a traditional college level introductory macroeconomics course

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy's Macroeconomics channel: https://www.youtube.com/channe....l/UCBytY7pnP0GAHB3C8
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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/algebra2/x2ec2f6f

Change of Base Formula

Watch the next lesson: https://www.khanacademy.org/math/algebra2/logarithms-tutorial/logarithm_properties/v/proof-log-a-log-b-log-ab?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII

Missed the previous lesson?
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Algebra II on Khan Academy: Your studies in algebra 1 have built a solid foundation from which you can explore linear equations, inequalities, and functions. In algebra 2 we build upon that foundation and not only extend our knowledge of algebra 1, but slowly become capable of tackling the BIG questions of the universe. We'll again touch on systems of equations, inequalities, and functions...but we'll also address exponential and logarithmic functions, logarithms, imaginary and complex numbers, conic sections, and matrices. Don't let these big words intimidate you. We're on this journey with you!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Algebra II channel:
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Worked example where we walk through finding the major trig ratios

Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/trigonometry/basic-trigonometry/reciprocal-trig-functions/e/reciprocal_trig_funcs?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry

Watch the next lesson: https://www.khanacademy.org/math/trigonometry/basic-trigonometry/reciprocal-trig-functions/v/example-using-trig-to-solve-for-missing-information?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry

Missed the previous lesson?
https://www.khanacademy.org/math/trigonometry/basic-trigonometry/trig-application-problems/v/figuring-out-coordinate-of-bended-figure-using-trig?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry

Trigonometry on Khan Academy: Big, fancy word, right? Don't be fooled. Looking at the prefix, tri-, you could probably assume that trigonometry ("trig" as it's sometimes called) has something to do with triangles. You would be right! Trig is the study of the properties of triangles. Why is it important? It's used in measuring precise distances, particularly in industries like satellite systems and sciences like astronomy. It's not only space, however. Trig is present in architecture and music, too. Now you may wonder...how is knowing the measurement and properties of triangles relevant to music?? THAT is a great question. Maybe you'll learn the answer from us in these tutorials!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Trigonometry channel:
https://www.youtube.com/channe....l/UCYQSs1lFJZKpyqNQQ
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

What happens when you add zinc to a solution of copper sulfate? Identifying the half reactions to see what got oxidized and reduced.

Watch the next lesson: https://www.khanacademy.org/science/chemistry/oxidation-reduction/batter-galvanic-voltaic-cell/v/galvanic-cell-voltaic-cell?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry

Missed the previous lesson? https://www.khanacademy.org/science/chemistry/oxidation-reduction/redox-oxidation-reduction/v/redox-titration?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry

Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Chemistry channel: https://www.youtube.com/channe....l/UCyEot66LrwWFEMONv
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

How can we tell if a sequence converges or diverges? See Sal in action, determining the convergence/divergence of several sequences. Created by Sal Khan.

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/ap-calculus-bc/bc-series/bc-inf-sequences/e/convergence-and-divergence-of-sequences?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusBC

Watch the next lesson: https://www.khanacademy.org/math/ap-calculus-bc/bc-series/bc-finite-geo-series/v/series-as-sum-of-sequence?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusBC

Missed the previous lesson? https://www.khanacademy.org/math/ap-calculus-bc/bc-series/bc-inf-sequences/v/convergent-and-divergent-sequences?utm_source=YT&utm_medium=Desc&utm_campaign=APCalculusBC

AP Calculus BC on Khan Academy: Learn AP Calculus BC - everything from AP Calculus AB plus a few extra goodies, such as Taylor series, to prepare you for the AP Test

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Watch the next lesson:
https://www.khanacademy.org/economics-finance-domain/core-finance/interest-tutorial/present-value/v/present-value-4-and-discounted-cash-flow?utm_source=YT&utm_medium=Desc&utm_campaign=financeandcapitalmarkets

Missed the previous lesson? Watch here: https://www.khanacademy.org/economics-finance-domain/core-finance/interest-tutorial/present-value/v/present-value-2?utm_source=YT&utm_medium=Desc&utm_campaign=financeandcapitalmarkets

Finance and capital markets on Khan Academy: If you gladly pay for a hamburger on Tuesday for a hamburger today, is it equivalent to paying for it today? A reasonable argument can be made that most everything in finance really boils down to "present value". So pay attention to this tutorial.

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

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Subscribe to Khan Academy’s Finance and Capital Markets channel: https://www.youtube.com/channe....l/UCQ1Rt02HirUvBK2D2
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