We are constructing confidence intervals for the mean number of women employed in software companies. We have a random sample of 30 companies, and the population's standard deviation is unknown. What would be the correct degrees of freedom for constructing the confidence intervals?
A) 30
B) 29
C) 15
D) 1

Question

Quizplus · Accepted Answer

When the population standard deviation is unknown and a sample is used, the degrees of freedom for constructing confidence intervals is calculated as the sample size minus one, which is 30 - 1 = 29.

We Are Constructing Confidence Intervals for the Mean Number of Women