Answered: certain survey, adults spend 2.35…

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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According to a certain survey, adults spend 2.35 hours per day watching television on a weekday. Assume that the standard deviation for "time spent watching television on a weekday" is 1.93 hours. If a random sample of 40 adults is obtained, describe the sampling distribution of x, the mean amount of time spent watching television on a weekday. x is approximately normal with μx=2.352.35 and σx=30516. Determine the probability that a random sample of 40 adults results in a mean time watching television on a weekday of between 2 and 3 hours.The probability is. 8577.

One consequence of the popularity of the Internet is that it is thought to reduce television watching. Suppose that a random sample of

35 individuals who consider themselves to be avid Internet users results in a mean time of 1.89 hours watching television on a weekday. Determine the likelihood of obtaining a sample mean of 1.89 hours or less from a population whose mean is presumed to be 2.35 hours. The likelihood is _____

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