The confidence level is 99% , o= 4178 thousand dollars, and the histogram of 59 player salaries of football players. Find the critical value za/2 and ta/2

The earned run average of the two players is 3.7 each but the mean absolute deviation (MAD) for Ashley is 1.7 and for Kimberly is 0.6. The coach wants the best overall play; which player would the coach prefer to choose?

A researcher gathered data on five randomly selected individuals from a data set. The ages are 25, 27, 20, 21, and 29. What is the standard deviation for respondent's age?

Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 44 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that ? = 7.50 ml/kg for the distribution of blood plasma. When finding an 99% confidence interval, what is the critical value for confidence level? (Give your answer to two decimal places.) zc =  (a) Find a 99% confidence interval for the population mean blood plasma volume in male firefighters. What is the margin of error? (Round your answers to two decimal places.) lower limit upper limit margin of error