[商管] [統計]
請問這題
Let P-hat for estimating the population proportion p be
0.5 based on a sample of size 100. then the estimated
standard error of P-hat is
(A)0.0025
(B)0.005
(C)0.025
(D)0.05
(E)0.25
我覺得答案是0,05
P-hat服從N( p, [p(1-P)]/N )
(0.25/100)^(1/2)=0.05
但解答給C
不知道是我哪邊搞錯了嗎??
--
孩提時,這世界圍繞著我運轉
現在我聲嘶力竭地追逐這個真實世界!
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 61.224.96.186
推
01/24 14:32, , 1F
01/24 14:32, 1F