Twenty randomly selected students took the statistics final. If the sample mean was 88 and the ó =5.2, construct a 95% confidence interval for the mean score of the students.

Answer 1

Formula:

CI95 = mean ± 1.96(sd/√n)

With your data:

CI95 = 88 ± 1.96(5.2/√20)

Calculate for the interval.