Question 9 18 pts The white blood cell count of a sample of 40 males are summarized in the frequency distribution below. If you use your calculator, indicate the inputs and functions used. Don't forget units. Round appropriately. White Blood Cell it of men count 3.0 4.9 B 5.0 , 6.9 15 7.0 8.9 11 9.0 10.9 S 11.0 12.9 1 Answer the following questions in the text box below. A. (2 pts) What is the class width? ________________ B. (2 pts) What is the lower class limit for the 2nd class? ________________ C. (4 pts) What are the lower and upper class boundaries for the 4* class? __________________ D. (3 pts) What is the mean of the frequency distribution? ____________________ E. (2 pts) What is the cumulative frequency of the 3rd class? _ F. (2 pts) What is the relative frequency of the 2nd class? _____________________ G. (3 pts) What is the standard deviation of the frequency distribution? ,,,,,,,,,,,,,,, Edit View Insert Format Tools Table 17ntv Parauranhv D. T ll Av iv Tzv : D Question 10 8 pts The mean replacement time for a sample of 20 washing machines is 11.0 years and the standard deviation is 2.5 years. Construct the 99% confidence interval for the standard deviation, o, of the replacement times of all washing machines of this type. There are 3 answer boxes. The first 2 are the values and the last one is the units. Make sure that you round appropriately