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Title [Brian Rhee] proportion z test
Lesson 16 test about population proportion 16
Author roi*** Date Posted 2024-03-26 오후 8:37:29

one proportion z test에서 test statistics을 구할 때 z 값의 분모, 즉 standard deviation에 po 값이 들어가는데

confidence interval을 구할 때는 p hat의 값이 들어가는 이유가 무엇인가요? 

계속 헷갈려서 여쭤봅니다
2024-03-27 오후 8:38:58

 

안녕하세요 이연욱 샘입니다.

 

In significance test, we assume that the null hypothesis is true such that H0: p=p0. Therefore, we use p0 when we calculatge z test statistic.

 

However, confidence interval uses sample proportion (P hat) to predict the true population proportion.

 

감사합니다.
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