Please answer and explain 4-8, the solution is posted.

3-4 In the study of cell phone use and sperm function, the investigators also measured sperm viability for the differ ent categories of ccli phone users. 15 there a difference in viability among these groups? (See Table 3-6.] 4-8 The control group (no exposure) and the low expo sure group are not detectably different from each other. The Medium and High use men have lower sperm Viabil ity than the Control/Low exposure men and each other. Hence, there are three subgroups in the sperm viability: (1) Control and Low exposure, (2) Medium exposure, and (3) High exposure. Comparison Control vs. High Low vs. High Control vs. Medium Medium vs. High Low vs. Medium Control vs. Low 1/ = 156 4-8 Problem 3-4 led to the conclusion that there were dif- ferences in sperm viability among men with different lev- els of cell phone use. What are the detectable subgroups in this response? Use a Holm-Sidak t test.TABLE 3-6. Sperm Viability (%) Observed Cell Phone Use Sample Size (n) Mean Standard Deviation Control (no cell phone use) 40 72 Low use (4 h/d) 40 47 17