An article in ieee international symposium on electromagnetic compatibility quantified the absorption of electromagnetic energy and the resulting thermal effect from cellular phones. the experimental results were obtained from in vivo experiments conducted on rats. the sample mean and sample standard deviation arterial blood pressure values (mmhg) for the control group (8 rats) during the experiment are x1 90,s1 5 and for the test group (9 rats) are x2 = 1 15,$2 = 10. is there evidence to support the claim that the test group has higher mean blood pressure? (a) state the null and alternative hypothesis, the test statistic, and the critical region. (b) do the data support the claim that the mean blood pressure from the test group is at least 15 mmhg higher than the control group? state the null and alternative hypothesis the test statistic, and the critical region. (5 points) for a bacteria population with an initial biomass concentration of 235 mg/l and a ke 0.55 days , calculate the time necessary to reduce the population to 0.005 mg/l assuming that the food supplies have been exhausted. start your solution with the general growth rate expression: フ dx