In a University have 660 students and found that 429 of the students are IQ 140. Compute and interpret the 95% confidence interval for the proportion of students with IQ 140.
要長答,唔駛解釋
confidence interval 問題
2011-09-22 9:03 am
回答 (1)
2011-09-22 3:17 pm
✔ 最佳答案
p = 429/660 = 0.65sample size = 660
For 95% c. i., critical value = 1.96
A 95% c. i. for the proportion is
= {0.65 - 1.96 sqrt [0.65(1 - 0.65)/660], 0.65 + 1.96 sqrt [0.65(1 - 0.65)/660]}
= (0.65 - 0.03638, 0.65 + 0.03638)
= (0.6136, 0.6864)
收錄日期: 2021-04-25 22:38:49
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110922000051KK00028