Suppose that the number of customers who enter a supermarket each hour is normally distributed with a mean of 640 and a standard deviation of 240. The supermarket is open 17 hours per day. What is the probability that the total number of customers who enter the supermarket in one day is greater than 10200? (Hint: Calculate the average hourly number of customers necessary to exceed 10200 in one 17-hour day.)
Probability = ?? ______
Suppose that the number of customers who enter a supermarket each hour is normally distributed with...
Suppose that ? is normally distributed with mean 85 and standard deviation 16. A. What is the probability that ? is greater than 104.2? Probability = B. What value of ? does only the top 12% exceed? ? =
Suppose that ? is normally distributed with mean 115 and standard deviation 15. A. What is the probability that ? is greater than 134.8? Probability = B. What value of ?X does only the top 14% exceed? ? =
Suppose that X is normally distributed with mean 95 and standard deviation 13. A. What is the probability that X is greater than 113.72? Probability = B. What value of X does only the top 14% exceed? X =
Suppose that X is normally distributed with mean 105 and standard deviation 12. A. What is the probability that X is greater than 126.24? What value of X does only the top 11% exceed?
1. A gas station opens at a time which is Normally distributed with the mean of 8:45 am and standard deviation of 10 minutes; similarly, its closing time is Normally distributed with the mean value at 5:12 pm and standard deviation of 15 minutes. If customers arrive as a Poisson Process with an average rate of 11.3 per hour, find the mean number of customers to be served in one such day, and the corresponding standard deviation. What is the...
Case 1 The amount of money spent by Safeway customers is normally distributed with mean 140 and a standard deviation of 12. Suppose that a sample of 64 customers are selected. Answer the following questions. What is the mean of the sampling distribution? 140 150 170 240 What is the standard error of the sampling distribution? 1.23 1.50 1.55 1.20 What is the probability that the average spending by the customers is greater than 144? 0.9962 0.9966 0.0038 0.0048 What...
Suppose that X is normally distributed with mean 105 and standard deviation 16. A. What is the probability that X is greater than 131.4? B. What value of X does only the top 11% exceed?
The number of beverage cans produced each hour from a vending machine is normally distributed with a standard deviation of 8.6. For a random sample of 12 hours, the average number of beverage cans produced was 326.0. Construct a 99% confidence interval for the population mean number of beverage cans produced per hour.
(1 point) Suppose that X is normally distributed with mean 120 and standard deviation 14. A. What is the probability that X is greater than 140.58? Probability = B. What value of X does only the top 14% exceed? X =
ased on the 1990 y normally distributed with a mean of 5 hours and a of 1.3 hours. more than 8.5 hours per day watching television? (b) In a 1998 study of television viewing, a random sample of 500 adults of this survey appear to be consistent with the 1990 census? (Hint: the census results are still P5.5) reported that the average number of hours spent viewing television was greater than s.s hours per day. Do the results correct, what...