CTake QuizQuestion 31 ptsA college has decided to add support courses to its statistics classes to assist students. Welook at the next semester to determine if the addition of the support courses assistedstudents. In a sample of 4 courses with support courses the average final grade of 160students was 78% with a standard deviation of 2%. Calculate a 95% confidence interval forthe population mean of students who took a support course. (Type numbers in Excelcalculator without percent sign)O (77.69, 78.31)O (77.70, 78.30)(77.69, 78. 30)O (77.68, 78.31)O4 is not larger than 40 so we cannot compute a confidence interval.1 ptsQuestion 4 Question 41 ptsIn a sample of 5 courses with no support course the average final of 200 students was 70%with a standard deviation of 10%. Calculate a 95% confidence interval for the mean ofstudents who did not take a support course. (Type numbers in Excel without percent sign)O (68.61, 71.39)O (68.61, 71.38)(68.60, 71.39)(69.96, 70.04)5 is not larger than 40 so we cannot compute a confidence interval,pts

Given that: Sample size, n = 160 Sample mean, x¯=78 Sample standard deviation, s = 2

A college has decided to add support courses to its statistics classes to assist students. We look at the next semester to determine if the addition of the support courses assisted students. In a sample of 4 courses with support courses the average final grade of 160 students was 78% with a standard deviation of 2%. Calculate a 95% confidence interval for the population mean of students who took a support course. (Type numbers in Excel calculator without percent sign) O (77.69, 78.31) O (77.70, 78.30) O (77.69, 78. 30) O (77.68, 78.31) 4 is not larger than 40 so we cannot compute a confidence interval.