Ages of Moviegoers Based on the data from Cumulative Review Exercise 7, assume that ages of moviegoers are normally distributed with a mean of 35 years and a standard deviation of 20 years. a. What is the percentage of moviegoers who are younger than 30 years of age? b. Find P25 , which is the 25th percentile. c. Find the probability that a simple random sample of 25 moviegoers has a mean age that is less than 30 years. d. Find the probability that for a simple random sample of 25 moviegoers, each of the moviegoers is younger than 30 years of age. For a particular movie and showtime, why might it not be unusual to have 25 moviegoers all under the age of 30?
Ages of Moviegoers Based on the data from Cumulative Review Exercise 7, assume that ages of moviegoers are normally distributed with a mean of 35 years and a standard deviation of 20 years. a. What is the percentage of moviegoers who are younger than 30 years of age? b. Find P25 , which is the 25th percentile. c. Find the probability that a simple random sample of 25 moviegoers has a mean age that is less than 30 years. d. Find the probability that for a simple random sample of 25 moviegoers, each of the moviegoers is younger than 30 years of age. For a particular movie and showtime, why might it not be unusual to have 25 moviegoers all under the age of 30?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Ages of Moviegoers Based on the data from Cumulative Review Exercise 7, assume that ages of moviegoers are
a. What is the percentage of moviegoers who are younger than 30 years of age?
b. Find P25 , which is the 25th percentile.
c. Find the probability that a simple random sample of 25 moviegoers has a mean age that is less than 30 years.
d. Find the probability that for a simple random sample of 25 moviegoers, each of the moviegoers is younger than 30 years of age. For a particular movie and showtime, why might it not be unusual to have 25 moviegoers all under the age of 30?
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