Question

calculate the p value for the following hypothesis test for a sample size 100 which resulted in a test statistic value of z=2.31
H0: mu=15
H1: mu=/ 15

Answer 1

assuming that's H1: mu =/= 15, this is a two tailed test

Answer 2

so you first need to find the area under the curve to the right of z = 2.31 (either use a calculator or table)

then double that area