Based upon simple random sampling of 100 college students,the mean GPA was 2.3 with a standard error of 0.3.We are 68% confident that the population parameter is
A) between 1.4 and 2.6
B) between 1.7 and 2.9
C) 2.3
D) between 2.0 and 2.6
E) less than 1.4

Question

Quizplus · Accepted Answer

A 68% confidence interval corresponds to one standard error from the mean. The mean is 2.3, and the standard error is 0.3, so the interval is 2.3 ± 0.3, which is between 2.0 and 2.6.

Based Upon Simple Random Sampling of 100 College Students,the Mean