(b) According to the American Time Survey, married men aged 25 to 54 who work fullsleep an average of 7.43 hours per night. Assume the currently the times that suchmen sleep per night have a normal distribution with a mean of 7.43 hours and astandard deviation of 0.80 hours. Find the percentage of such men who sleepiBetween 6.5 and 8.5 hoursiiLess than 6 hours

Given Data : Population Mean,μ = 7.43 Population Standard Deviation,σ = 0.80

Answered: (b) According to the American Time…

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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The distribution of grades in a final exam conforms to the normal distribution with an average of 60 and a standard deviation of 8. Since the students taking the exam are 350 people, it is required to pass 300 of them.What is the lowest grade required to pass?
A taxicab company in New York City analyzed the daily number of miles driven by each of its drivers. It found the average distance was 200 mi with a standard deviation of 30 mi. Assuming a normal distribution, what prediction can we make about the percentage of drivers who will log in either more than 260 mi or less than 170 mi?
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The lengths of a particular animal's pregnancies are approximately normally distributed, with mean = 251 days and standard deviation = 12 days. What proportion of pregnancies lasts between 248 and 257 days?
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