Question

Love, Vinson, Tolsma, and Kaufmann (2008) studied the psychological effects of being an undercover officer, including the stress it places on a marriage. In a sample of 239 former officers, the researchers recorded that 145 officers reported symptoms of marital stress but 94 didn't. Assume we would expect to observe equal frequencies. Use a goodness-of-fit test with an alpha = 0.05.

a) State the null and alternative hypotheses.

b) State the critical value.  

c) Calculate the expected frequencies and the chi-square statistic.  

d) Decide to reject or fail to reject the null hypothesis and interpret that decision.

Answer 1