count18
mean5.3433
sample variance0.0164
sample standard deviation0.1280
如果我想知mean>5.5既probability係幾多
點計?
用excel
Statistic 問題
2010-03-04 12:27 pm
回答 (1)
2010-03-04 5:06 pm
✔ 最佳答案
Pr (population mean > 5.5) = Pr {Z > [sqrt(18) x (5.5 - 5.3433) / 0.128]} = Pr (Z > 5.1939) = 1 - Pr (Z < 5.1939)with Excel function NORMSDIST
Pr (Z < 5.1939) =NORMSDIST(SQRT(18)*(5.5-5.3433)/0.128) = 1.000
Hence, Pr (population mean > 5.5) = 0
收錄日期: 2021-04-23 18:26:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100304000051KK00179