Question 8 Point What should be the value of t* used in a confidence 93% confidence interval that is based on a sample of size 15? A 1.96 B 1.76 C 1.95 D 1.81 Question 9 1 Point A survey of 200 university students found that the average number of hours per week that students working in casual jobs was 7.10. If the standard deviation for hours worked per week was 5 hours, what is the 95% confidence interval based on the sample of 200 students? A (7.10, 8.48) B (6.10, 8.10) C (6.40, 7.80) D (6.57, 7.63) Question 10 1 Point The data below show the maximum breadths of samples of male Egyptian skulls from 4000 B.C. 4000 B.C. 131 119 138 125 129 126 131 132 126 128 128 131 The 95% confidence interval for the population mean is A) (124.51,132.83) B (118.46,138.86) c) (125.72,131,61) D (131.07,126.26)