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QUESTION 7 A random sample of 16 lunch customers was taken at a restaurant. The average amount of time the customers in the sample stayed in the restaurant was 45 minutes with a standard deviation of 14 minutes. Assuming that the time spent by customers in the restaurant is normally distributed, nd the corresponding critical value for calculating a 96% condence interval. Round your answer to three decimal places. QUESTION 8 In a large population of adults, the mean IQ is 112 with a standard deviation of 20. If 200 adults are randomly selected, then the distribution of the sample mean IQ is 0 Approximately normal with mean 112 and standard deviation of 1.414. 0 More information is needed. 0 Approximately normal with mean 112 and standard deviation of 20. O Exactly normal with mean 112 and standard deviation 20. QUESTION 9 The central limit theorem states if the sample size n is large then 0 the distribution of the population mean is approximately normal. 0 the distribution of the sample data is approximately normal. 0 the distribution of the sample mean is approximately standard normal. 0 the distribution of the sample mean is approximately normal