Question 1 4 pts What is the life span of a lab mouse? You measured the following life spans (in days) for a certain standard inbred laboratory strain. 813, 1125, 1074, 1025, 759 You may assume for the following questions that the distribution of life span is normal. (a) Calculate the sample mean 2. 7 = [ Select ] (b) Calculate the sample standard deviation s. s = [ Select ] (c) Calculate the critical value t* for a 87 percent two-sided confidence interval, t* = [ Select ] (d) Calculate the margin of error m for a 87 percent two-sided confidence interval. m = [ Select ] (e) The lower bound of the 87 percent two-sided confidence interval is [ Select ] and the upper bound of the two-sided confidence interval is [ Select ] (f) Calculate the critical value t* for the 87 percent lower-bound confidence interval. t* = [ Select ] (g) Calculate the lower bound of the 87 percent lower-bound confidence interval. We can be 87 percent confident that the mean life span of the lab mouse is more than [Select ] days . (h) Calculate the upper bound of the 87 percent upper-bound confidence interval. We can be 87 percent confident that the mean life span of the lab mouse is less than [ Select ] Please note that the confidence intervals in (g) and (h) are not simultaneously valid