AP Statistics 2020 Review: Choosing Hypothesis Tests

[@jimbobcooter5161]

Where is my 1 gang at?

[@jasonpark2273]

CMON GUYS, THIS IS ONE OF OUR LAST AP EXAMS, WE CAN DO THIS

[@debrebeuf8959]

Jason Park: nah i gotta redo one of mine

[@jasonpark2273]

@@debrebeuf8959 :( i feel your pain, hang in there my friend

[@julianharris6253]

Boutta he clip

[@randompersonlol7519]

Nah fam I haven't learned anything all year from my AP stats class

[@arizz620]

How you doing man, what'd you get?

[@tannerrivera75]

Where's my 1 hour before the test gang

[@zanger4002]

hell yea

[@McDessertGamer]

BEST REVIEW I'VE SEEN YET!! Thank you so much for simplifying and making it SUPER easy, I was stressing because I have my exam in a couple hours and had no clue what to do.

[@AllenTsaoSTEMCoach]

You got this! Relax and just do your best with Wendy you know. Good luck!

[@janetlim6303]

Thank you so much! You made AP Stats much easier than the way my teacher explains this. Good luck on the exam!

[@etuv213]

We gonna kill it today

[@janetlim6303]

I felt so confident taking the AP Stats exam, and it's all thanks to your videos! Thanks again! 🤗

[@ozapenguin]

This is very helpful! I was looking for a video like this and I found this video 10 minutes after you uploaded it!

[@AllenTsaoSTEMCoach]

Nice timing! Glad you found it helpful!

[@tylereslinger9005]

where my fellow 2024 seniors at trying not to get a 1 tomorrow at

[@rashawnpierre7084]

I'm a junior but I'm cooked too 😭😭

[@tylereslinger9005]

@@rashawnpierre7084 good luck 😭

[@veronicaexists7195]

present and accounted for! leaving for school in 10 minutes

[@Laggyboi]

Me bro

[@aiman_a]

Hello! I just wanted to say thank you so much for making these videos. Because of you, I actually managed to score well on this exam, which is something I never thought I would be able to do. Thank you for all the effort you put in to these! :)

[@AllenTsaoSTEMCoach]

That's awesome! I'm glad you found the videos helpful, and congratulations and doing well on the exam!

[@a4gkyum]

For anyone reading this, don't forget that you prepared hard for this, and you'll do absolutely fantatistic in this test! Good luck, and let's all get that 5!

[@neilsorkin7970]

2 minutes to start. Bless this man if I get a 4 or 5.

[@richardren1328]

Thank you so much! Short concise non-confusing, straight to the point!

[@lianglu718]

OMG THANK YOU SO MUCH! Everything I didn't understand was covered in this video.

[@justjeechess]

Thanks for this video! Currently studying for my final fundamental stats exam in Uni.

[@AllenTsaoSTEMCoach]

Good luck!!

[@tru_mc308]

cramming in 2024🤣🤣

[@danyy8000]

Yo

[@kj_joestar7663]

Cramming 30 minutes before my exam

[@Laggyboi]

SAME 😢

[@sachatheulicide8358]

Thank you very much

[@ShadowEric]

13 minutes before the exam gang?

[@kj200]

you... are a godsend

[@chasestapleton9497]

Where's my fellow 2022 crammers at?!

[@nyakuri1055]

right here with ya good luck to everyone

[@clintn.kildepstein1656]

Good luck homies

[@cocopebblz4502]

Takin it in 40 minutes

[@clintn.kildepstein1656]

Bro that was so hard😭

[@chasestapleton9497]

MC easier than I thought it would be. FR harder

[@potatopotato2756]

oh no bro 18 min left

[@deathmatcher69]

AP exam tmr lets do this

[@jamjam-qg7zg]

three hours before my exam fingers crossed 😬🤞

[@kkim7324]

hi sir if we use your calculator how would we be able to show our work on the exam?

[@AllenTsaoSTEMCoach]

If you're running a hypothesis test, you should be writing out all your hypothesis, test statistic and standard error values, the Pvalue, and comparison with the significance level to justify your conclusion. You still need to write all of that out. The calculator just helps you calculate the specific numbers correctly.

[@edbrains9742]

Hi! I've been taught that, even if the sample is large (>=30), I should use a t-test. At least, this is what my book said. It also recommended that I only use a 1-sample z test for mean only when we know the population standard deviation (and not if the sample is sufficiently large). Is this correct? Thank you!

[@skhoakproductions3691]

Yes you only use t-test when standard deviation is not given to you in the question

[@AllenTsaoSTEMCoach]

Yes that is technically correct. However as the sample size increases, the t distribution looks a lot like the normal distribution. So it's acceptable to get your answer. You have to remember that all of these distributions are approximations. So we are really discussing how "accurate" you're trying to get. A t distribution with 1000 samples is practically identical to a normal distribution. At some point, you're just splitting hairs on the calculation.

[@edbrains9742]

@@AllenTsaoSTEMCoach Thank you! I took the retake today, and it was a great degree harder than the original. :(

[@AllenTsaoSTEMCoach]

@@edbrains9742 oh man I'm so sorry to hear that. I hope the score comes out more favorable and that they scale the score easier given the different format. At least it is done and you can put it behind you.

[@edbrains9742]

Bothell STEM Coach Thank you. I agree.

[@Peyton]

Question: for 2 prop z test, if your hypothesis is that p1 = p2, don’t you use p hat sub c to check for normality?

[@AllenTsaoSTEMCoach]

Yes. You can use the pooled proportion to check for normality as long as your null hypothesis is that the proportions are the same (and this, their variance is the same)

[@Peyton]

Bothell STEM Coach Thank you for the quick response!

[@zonneP]

yo thanks

[@candyapples4953]

can you use a t test for proportions in confidence intervals?

[@AllenTsaoSTEMCoach]

No. You always use a normal distribution (z) for proportions.

[@니모-b6w]

Lopez Kenneth Gonzalez Brian Martinez Edward

[@nick2629]

50 minutes before exam?

[@zanger4002]

ye

[@kanghuanxu8265]

🙏 thanks!

[@qingyuezhang4117]

w/ replacement and without replacement is a bit confusing

[@AllenTsaoSTEMCoach]

Here's an example. If I have a bag of 5 red marbles, and 5 blue marbles. With replacement: if I draw two marbles with replacement, that means I draw 1 marble. Then put it back, and draw another marble. The probability of getting two red marbles is 1/2*1/2 = 1/4. If I draw without replacement, then I don't put the first marble back. The probability of drawing two red marbles is 5/10 * 4/9 because I already removed one red marble when I draw the second one. Without replacement means each draw is not independent.

[@qingyuezhang4117]

@@AllenTsaoSTEMCoach Thank you sooo much!!!

[@calliasroom]

Thank you!!!

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Not all heroes wear capes.

[@gurvir7284]

BOUTA FAIL TOMORROW WOOOO

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👌

[@zamaray9170]

im not watching this an hour before my exam yeah def not