You have a sample of 40 counseling students you are working

You have a sample of 40 counseling students you are working with. You want to alleviate

        test anxiety by meditation before and after class. Before the final exam you calculate the

        mean of anxiety from the class that has taken a anxiety assessment and you compare it to

        the population mean of the instrument you used as an assessment. The population ? and

        variance are known. What hypothesis test

        statistic will you use? _________________

Solution

when population variance is know, z-test is conducted

Hypothesis

Ho: u =a

Ha: u!=a

test static z = x-u/std/sqrt(n)

u = population mean

std = standard deviation

n = size of sample

x = mean obtained from observation