您还没有绑定微信,更多功能请点击绑定

CQE考题求助??感谢!

 The factory installed brake linings for a certain kind of car have a mean lifetime of 60,000 miles with a 6,000 mile standard deviation. A sample of 100 cars has been selected for testing. What is the standard error of ? (Assume that the finite population correction may be ignored.) The factory installed brake linings for a certain kind of car have a mean lifetime of 60,000 miles with a 6,000 mile standard deviation. A sample of 100 cars has been selected for testing. What is the standard error of ? (Assume that the finite population correction may be ignored.)
对“好”的回答一定要点个"赞",回答者需要你的鼓励!
已邀请:

杨格_Alan (威望:668) (江苏 无锡) 机械制造

赞同来自: ZY518888 jacd 青岛阿永 soshnshn JimmyYin

The standard error of the mean (SEM) can be expressed as:


1.png


where

σ is the standard deviation of the population.
n is the size (number of observations) of the sample.

4 个回复,游客无法查看回复,更多功能请登录注册

发起人

扫一扫微信订阅<6SQ每周精选>