"75. A plethora of pepperoni? Refer to Exercin 73 a. Explain why it was necessary to inspect a graph of the sample data when checking the Normal/Large Sample condition. b. According to the manager of the restaurant, there should be an average of 40 pepperonis on a large pizza. Based on the interval, is there convincing evidence that the average number of pepperonis is less than 40? Explain your answer. 78. The SAT again High school students who take the SAT Math exam a second time generally score higher than on their first try, Past data suggest that the score increase has a standard deviation of about 50 points. How large a sample of high school students would be needed to estimate the mean change in SAT score to within 2 points with 95% confidence