need help for the following questions

prb1

Homework: Assignment 13 Homework Problems (7.2) Question 6, Question 6, ... HW Score: 7.69%, 1 of 13 points Save Part 1 of 2 O Points: 0 of 2 Assume that all grade-point averages are to be standardized on a scale between 0 and 6. How many grade-point averages must be obtained so that the sample mean is within 0.014 of the population mean? Assume that a 99% confidence level is desired. If range 6-0 using the range rule of thumb, o can be estimated as 4 4 = 1.5. Does the sample size seem practical? The required sample size is (Round up to the nearest whole number as needed.)Question 1, Question 1, ... HW Score: 7.69%, 1 of 13 points Homework: Assignment 13 Homework Problems (7.2) Save Part 1 of 4 O Points: 0 of 3 Refer to the accompanying data display that results from a sample of airport data speeds in Mops. Complete parts (a) through (c) below. TInterval (13.046,22.15) x = 17.598 Sx = 16.01712719 n = 50 a. Express the confidence interval in the format that uses the "less than" symbol. Given that the original listed data use one decimal place, round the confidence interval limits accordingly. Mops