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 170. The supermarket isopen 18 hours per day. What is the probability that the total number of customers who enter the supermarket in one day is greater than 12500? (Hint: Calculate the averagehourly number of customers necessary to exceed 12500 in one 18-hour day.)Probability = |

Suppose that the number of customers who enter a supermarket each hour is normally distributed with…

Answered: ber of customers who enter a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Assume that a root beer factory’s production is normally distributed with a mean of 100,000 gallons of root beer per day and a standard deviation of 25,000 gallons per day. Using the standard normal table, determine the probability that the factory produces more than 85,000 barrels of root beer in a given day. Round your answer to 4 decimal places
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 175.2-cm and a standard deviation of 1.8-cm. For shipment, 20 steel rods are bundled together.Find the probability that the average length of a randomly selected bundle of steel rods is greater than 176.2-cm.P(M > 176.2-cm) = ________Enter your answer as a number accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
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Assume that the traffic to the web site of Smiley’s People, Inc., which sells customized T-shirts, follows a normal distribution, with a mean of 4.6 million visitors per day and a standard deviation of 880,000 visitors per day. What is the probability that the web site has between 3 million and 4 million visitors in a single day? If needed, round your answer to four decimal digits.
Customers at a popular restaurant spend on average $32.30 per person. Assume that the amount spent follows approximately a normal distribution with a standard deviation of $5.25. What is the probability that a randomly selected customer will spend more than $40.00? • Below what cost do the 20% of customers paying the least spend?
company that owns a large number of grocery stores claims that customers who pay by personal check spend an average of $87 with a standard deviation of $22. Assume the amount spent by these customers is normally distributed. What is the probability that a customer spends more than $100? Express your answer as a decimal rounded to four places after the decimal point.
At night, John works occasionally as a waiter for his family's restaurant for which his monthly income is normally distributed with a mean of $1,579 and a standard deviation of $103. What is the probability that John will earn between $1,322 and $1,764 this month? (Keep 4 decimal places).
Assume that adults have IQ scores that are normally distributed with a mean of95.4 and a standard deviation of 16.6. Find the probability that a randomly selected adult has an IQ greater than 118.1 The probability that a randomly selected adult from this group has an IQ greater than 118.1 is what?
Full-time college students report spending a mean of 23 hours per week on academic activities, both inside and outside the classroom. Assume the standard deviation of time spent on academic activities is 3 hours. Complete parts (a) through (d) below. a. If you select a random sample of 16 full-time college students, what is the probability that the mean time spent on academic activities is at least 22 hours per week? (Round to four decimal places as needed.) b. If you select a random sample of 16 full-time college students, there is an 89% chance that the sample mean is less than how many hours per week? (Round to two decimal places as needed.) c. What assumption must you make in order to solve (a) and (b)? A. The population is uniformly distributed. B. The sample is symmetrically distributed, such that the Central Limit Theorem will likely hold. C. The population is symmetrically distributed, such that the Central Limit Theorem will…
r a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 510 and a standard deviation of 170 . The grading process of this year's exam has just begun. The average score of the 40 exams graded so far is 526 . What is the probability that a sample of 40 exams will have a mean score of 526 or more if the exam scores follow the same distribution as in the past? Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.

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ber of customers who enter a supermarket each hour is normally distributed with a mean of 640 and a standard deviation of 170 What is the probability that the total number of customers who enter the supermarket in one day is greater than 12500? (Hint: