t-distribution

in hive-196917 •  last year 

t-distribution
모집단의 분산을 모를 때 사용
표본의 개수(n)이 30 이상일 때 정규분포를 따른다고 가정할 수 있음.
정확히는 표본개수 무한대일 때 정규분포를 따름.

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      ·  last year 

    수알못이라..
    정의인가요? 가정인가요?

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        ·  last year 

      음.. 정의라기 보다는 T분포를 언제 사용하는지 메모해봤습니다. (표본 추출 시 모분산을 알 수 없고, 표본의 크기가 작은 데이터를 검정할 때 사용). 저도 수학을 잘하지는 않고 잠깐 통계 과목을 공부 중입니다 ㅎㅎ

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          ·  last year 

        Upvoted! Thank you for supporting witness @jswit.

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