The scores of all applicants taking an aptitude test required by a law school have a normal distribution with a mean of 420 and a standard deviation of 100. A random sample of 25 scores is taken. a. Find the probability that the sample mean score is higher than 450. b. Find the probability that the sample mean score is between 400 and 450. c. The probability is 0.10 that the sample mean score is higher than what number?
The scores of all applicants taking an aptitude test required by a law school have a normal distribution with a mean of 420 and a standard deviation of 100. A random sample of 25 scores is taken. a. Find the probability that the sample mean score is higher than 450. b. Find the probability that the sample mean score is between 400 and 450. c. The probability is 0.10 that the sample mean score is higher than what number?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 22PFA
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1. The scores of all applicants taking an aptitude test required by a law school have a normal distribution with a mean of 420 and a standard deviation of 100. A random sample of 25 scores is taken.
a. Find the probability that the sample mean score is higher than 450.
b. Find the probability that the sample mean score is between 400 and 450.
c. The probability is 0.10 that the sample mean score is higher than what number?
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