Hypothesis Testing With Two Proportions

This statistics video tutorial covers hypothesis testing with two proportions. It provides an example problem that shows you how to determine if the difference between two proportions is significant using the z-test and the normal distribution curve.

Confidence Intervals & Margin of Error:

Find The Z-Score Given Confidence Interval:

Student's T-Distribution:

Hypothesis Testing - Null & Alternative:

Type I and Type II Errors:

One Tailed and Two Tailed Tests:

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Test Static For Means & Pop Proportions:

Hypothesis Testing Problems:

P-Value Method - Hypothesis Testing:

Hypothesis Testing - Proportions:

Difference of 2 Means - H Testing:

Cohen's D - Pooled Standard Deviation:

Hypothesis Testing - 2 Proportions:

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Matched or Paired Samples t-Test:

Chi Square Test:

Chi Square Distribution Test:

Test of Independence - Chi Square Dist:

Final Exams and Video Playlists:

Full-Length Videos and Worksheets:

[mansaproduct]

I use these videos as examples to solve my assignments. If it was not for this man, I would have dropped my statistics class long time ago. Thank you man for saving me from failure

[prithviprakash]

Someone give this man a Nobel Peace Prize already.

[SunshineHuang]

From AP Calculus in high school to now college statistics, this man saved me a thousand times!

[anessaalrubaiawi]

I wish you'd do more of there... you'd help alot! Thanks as always

[teddyw.charawa]

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[alexs]

saving my master's degree in clinical psychology, bless you forever and ever and everrr,

[irishtwe]

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[divyarawat]

Thank you so much for saving me from stats like I really mean it.

[praneeith]

Bro I was looking for this question everywhere thank you so much

[RoseMbabazi-xj]

Why dont i meet such lecturers in my life? My poor background of Maths🤦‍♀️has come back to haunt me in biostatistics.

[cuddyrie]

Just calculated what I think is a significant result for my dissertation. Thank you so much! 😄

[platosfavoritestudent]

Ive learned more from this man than ant math teacher could dream of

[Matt-suyk]

Hello,
two separate questions derive from this example,
(1). Is the hypothesis testing and the formula still valid if the two groups were actually overlap? Extreme case would be the second group of 500 laptops were all in the first group.
(2). Is the hypothesis testing and the formula still valid if let's say we want to see if the battery defect in group one is significantly different then the monitor defect in group two (assuming the proportions still be 32 out of 800 in group one and 30 out of 500 in group two).

[lifeisnotajokee]

The difference between my professor and this teacher is that my professor makes it look more complicated while this teacher keeps it very simple and easy.

[chongoputa]

Request you do video of inference about more than two population means:ANOVA

[sz]

you saved me from an F on an exam thank you!!!

[sharkytv]

I put exact numbers into my excel. So, you're .06 for P^2 is actually .064. When you use .064 instead, you get a Z-crit of -1.9754 which is in the "reject" zone. So, there is significant evidence to support this claim.

[noeditbookreviews]

your pooled proportion part of your equation is showing P-hats. Shouldn't it be P-bars?

[laurapau]

in this kind of exercises i can never understand what to subtract first. If we have even two difference mean what should i subtract first? and then make the hypotesis

[lalitjoshi]

Can you please tell the method's definition as before applying the formula I require to explain about it in my thesis?? please