5. A sample of N = 4 individuals is selected from a normal population with = 70 and = 10.A treatment is administered in the sample, and after the treatment, the sample mean is found to be= 75.a. On the basis of the sample data, can you conclude that the treatment has a significant effect?Use a two-tailed test with = .05 b. Suppose that the sample consisted of N = 25 individuals and produced the same mean of= 75.Repeat the hypothesis z-Test at the .05 level of significance. c. Compare the results from part a and part b.How does the sample size influence the outcome of a z-test?