急! 統計學-假設檢定1題唔識做.?
回答 (1)
2015-10-12 9:39 am
Ho: μ > 25000 km
H1: μ <= 25000 km
Xbar = 27,000 km
S = 5,000 km
σ = S/√n = 5000/√15
α = 0.05 ==> 1-α = 0.95
Z = (27000 - 25000)√15 / 5000
= 2000*3.873 / 5000
= 1.55
P(0 < Z < 1.55) = 0.4394
P(Z > 1.55) = 0.5 + 0.4394 = 0.9394 < 0.95
所以拒絕Ho
H1: μ <= 25000 km
Xbar = 27,000 km
S = 5,000 km
σ = S/√n = 5000/√15
α = 0.05 ==> 1-α = 0.95
Z = (27000 - 25000)√15 / 5000
= 2000*3.873 / 5000
= 1.55
P(0 < Z < 1.55) = 0.4394
P(Z > 1.55) = 0.5 + 0.4394 = 0.9394 < 0.95
所以拒絕Ho
收錄日期: 2021-04-18 00:24:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20151011221234AAr0dcR