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For more information, please see full course syllabus of AP Statistics

For more information, please see full course syllabus of AP Statistics

1 answer

Last reply by: Sandahl Nelson

Sat Mar 25, 2017 10:03 PM

Post by So-Hee Park on March 25 at 08:49:43 AM

Hi Prof.Nelson,

I was really confused when you wrote the null hypothesis for the examples. I was thinking that the null hypothesis should be worded same as the problem. For example, "Example III:" question is worded "Does favorite subject differ by gender?" and you wrote the null hypothesis is "Favorite subject does NOT differ by gender."

However, in the interpretation when the null hypothesis is rejected, you said we have evidence to support the null hypothesis - favorite subject does differ by gender."

I don't understand how the null hypothesis in the hypothesis and the null hypothesis in the interpretation differs.

It seems like I am misunderstanding something! Please help!

1 answer

Last reply by: Firebird wang

Wed Oct 12, 2016 10:56 PM

Post by Xiaming Jin on May 7, 2016

Hi Professor Nelson,

Finally finished all lectures in AP statistics!

I just want to say thank you very much!!

These courses are the only thing I use for all my studying in statistics. And your explanation and examples in every lecture are very clear and help me a lot! Also thank you for your patient answers about my questions!

Hope to do well in AP exam several days after haha

Thanks again!

Xiaming Jin

1 answer

Last reply by: Sandahl Nelson

Mon Apr 4, 2016 3:19 PM

Post by Bhavya Vaghasia on April 3, 2016

Hello, I think for the conditions, it should be that all the expected values be greater than 5.

1 answer

Last reply by: Sandahl Nelson

Mon Apr 4, 2016 3:12 PM

Post by Liuzixuan Hu on March 29, 2016

For example II: Chi-Squared Goodness of Fit. your expected value should be 76.25 not 75.25.