The amount of time spent in prison has a mean of 5.2 years and a standard deviation of 1.3 years. A prison counselor is trying to develop a program to help people to change the amount of time they are in jail. A sample of n = 16 participated in this program and had the following jail times in years: 5.1, 2.9, 5.9, 4.5, 3.3, 5.7, 6.1, 5, 6, 5.2, 5.8, 5.7, 5, 1.9, 2, 5.9 According to these data, did the counselor's program change the length of prison time for the participants? (Use a = 0.05, two-tail test) Determine the Zcrit value. Calculate the mean (M) length of jail time for the sample. Calculate the standard error (ON) of prison time for the sample. Calculate the observed z score for the sample mean. Calculate the effect size using Cohen's d. What conclusion can the counselor make from these data?