Question

Suppose we are making a 95% confidence interval for the population mean from a sample of size 15. What number of degrees of freedom should we use?

A) 14
B) 15
C) 16
D) 29

Answer 1

The number of degrees of freedom for a 95% confidence interval with a sample size of 15 is 14.

Step-by-step explanation:

To calculate the number of degrees of freedom for a 95% confidence interval with a sample size of 15, we need to use the t-distribution. The formula for degrees of freedom in this case is n - 1, where n is the sample size. So, we would use 15 - 1 = 14 degrees of freedom.