2019 AP Statistics #4 - FRQ Solution - Released Free Response Question - 2-PropZTest - Tumbleweeds

This video is my attempt at the 2019 AP Statistics Free Response problem #4.
This problem required you to understand how to conduct a 2 Proportion Z Test to see if the a population proportion had changed.
My AP Statistics Practice Book has 100 problems (all with KZbin videos) and can be bought on Amazon: amzn.to/2LidOCW
If you are looking for a good gift for an AP Statistics teacher, how about a Normal Distribution Rubber Stamp: amzn.to/2KFP2vm
The problem this video discusses is copyrighted by The College Board and therefor not show in the video. To see this problems: apstudent.coll...
No copyright infringement intended.

[@jonathanl3824]

Could you use a two proportion 95% confidence interval? I did and also found a statistical difference

[@sebastian-nunez]

Are you allowed to use the combined proportion >= 5 to test normality? that's what we were taught in our class for 2-PropZTests

[@musicmeister1313]

did we have to draw the curve?

[@sophiemiller7838]

could you do a chi square for homogeneity?

[@sophiemiller7838]

Amit Das what if you multiplied the proportions by "n" to get values??

[@musicmeister1313]

@@sophiemiller7838 u trippin dawg

[@sophiemiller7838]

Blackboi Henry it was a valid question. i got the same answer.

[@lorizebrack-smith4034]

Does the AP exam allow you to use the calculator test without showing how you calculate the z-value or the combined p-hat and still get an E?

[@patrick-xu1go]

The way I was taught you have to say which test (2 proportion z test here) and the z/t score, p-value, and degrees of freedom if applicable (not for z tests i think)