AP Stats Review: How to Use Calculator for a Chi-Square Test

[@joshuaharris4087]

Thank you for this tutorial, Mr. Porinchak! Understanding how to use the TI-84 for chi-square tests is invaluable for statistics students. Your clear explanations make it much easier to grasp the concepts and apply them effectively. Looking forward to more helpful content from you!

[@24hrdog]

you don’t have to put the expected counts into the matrix it calculates it for you

[@mporinchak]

Wow I never knew that!!!!! Thanks hanks for sharing!!

[@yasminealjuba7231]

thanks for everything this year on ap stats! I got a 5.

[@mporinchak]

Great job! Great to hear, congrats!

[@inkysalad7895]

you really helped me review almost everything i needed help with this weekend 🙏🏻🙏🏻🙏🏻 you a legend fr

[@mporinchak]

Glad I could help. Good luck

[@DB77111]

@mporinchak Hello sir i think this is my last time here in this channel since i have got done with the ap stats exam. Although ill keep subscribed .Just wanted to THANK YOU as i went from expecting 3 to expecting (4,5) 98% confident😂 after watching your videos.youre doing a great job keep it up Sir !!!

[@amyzhao1118]

When doing a hypothesis test, do I have to show the work for the test statistic or can I just show the inputs on my calculator and write it instead?

[@lemonpiemarmalade]

Hi, how likely is it that a chi square test will come in frq?

[@mporinchak]

They are fairly common. Obviously don’t happen every year but they do happen often.

[@ukari_spiritwolf9361]

Can you show how to do it in a ti-nspire CX2 calculator since im using that and can't find the chi test that does both vectors

[@mporinchak]

Sorry!!! I have no idea how to use that calculator.

[@skineater0]

why do you find the chi-squared value if you only use the p-value in the conclusion?

[@mporinchak]

Technically the chi square comes first and then the p value is found with it. The calculator shows both.

[@skineater0]

@@mporinchak omg thank you🙏🙏

[@burhaankhurram4503]

Is there a faster way to find the table of expected values

[@mporinchak]

No unfortunately

[@dc_-zy2dw]

There is. On your ti-84, go to matrix and create table A based on the values given to you. Then, on table B, set up the same amount of rows and columns, and set all values in the table to 0. Then, run the chi square test, and not only will it give you your answer, but if you go back to matrix, table B will no longer have zeros, but instead the accurate predicted values. Try it out, it saves a LOT of time.

[@burhaankhurram4503]

Also I'm a little confused on the difference on when to use the 3 different tests

[@mporinchak]

This video explains the difference AP Statistics Unit 8 Chi Square Tests Summary Review Video kzbin.info/www/bejne/bGmuantriKplask

[@sportstalkwithjordan]

Question for anyone: do you do chi-squared independence and homogeneity the exact same way in the calculator, but with different conclusions. I know homogeneity is one variable two sample, and independence is 2 variable on sample

[@lemonpiemarmalade]

yes, pretty much it.

[@mporinchak]

Yep same procedure on the calculator.

[@sportstalkwithjordan]

@@lemonpiemarmalade Thank you for the help

[@sportstalkwithjordan]

@@mporinchak appreciate the answer and help!

[@assaashad3796]

why are we concluding the p values is > 0 when the question says that we perform it at the 1% level? shouldn't it be comparing our p value to 0.01?

[@mporinchak]

That was a typo! Sorry. Should have been 0.01

[@aabahdjfisosososos]

Why did you do 0 instead of 0.01?

[@mporinchak]

It was a type

[@mporinchak]

It was a typo

[@mporinchak]

It was a typo