Need help with the following problems

prb1

Homework: Assignment 13 Homework Problems (7.2) Question 2, Question 2, ... HW Score: 7.69%, 1 of 13 points Save O Points: 0 of 1 Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value to / 2, (b) find the critical value zo/2, or (c) state that neither the normal distribution nor 40- the t distribution applies. 30 The confidence level is 95%, o = 4153 thousand dollars, and the histogram of 61 player salaries (in thousands of dollars) of football players on a team is as shown. Frequency 20- 10- 4000 8000 12000 16000 20000 Salary (thousands of dollars) . . . . . Select the correct choice below and, if necessary, fill in the answer box to complete your choice O A. ta/2= (Round to two decimal places as needed.) OB. Za/2= (Round to two decimal places as needed.) O C. Neither the normal distribution nor the t distribution applies.Homework: Assignment 13 Homework Problems (7.2) Question 3, Question 3, ... HW Score: 7.69%, 1 of 13 points Save Points: 0 of 1 Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value to/2, (b) find the critical value Za/2, or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights of newborn girls: n = 289, x = 33.3 hg, s = 7.5 hg. The confidence level is 95%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. to/2= (Round to two decimal places as needed. O B. Za/2= (Round to two decimal places as needed.) O C. Neither the normal distribution nor the t distribution applies