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Suppose 450 test scores are normally distributed with mean 73.7 and standard deviation 2.5. a. How many test scores are within one standard deviation of the mean? Give your answer as a number, not as a percentage. b. What are the highest and lowest of those scores?

Suppose 450 test scores are normally distributed with mean 73.7 and standard deviation 2.5. a. How many test scores are within one standard deviation of the mean? Give your answer as a number, not as a percentage. b. What are the highest and lowest of those scores?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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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Suppose 450 test scores are normally distributed with mean 73.7 and standard deviation 2.5. a. How many test scores are within one standard deviation of the mean? Give your answer as a number, not as a percentage. b. What are the highest and lowest of those scores?
Transcribed Image Text:Suppose 450 test scores are normally distributed with mean 73.7 and standard deviation 2.5. a. How many test scores are within one standard deviation of the mean? Give your answer as a number, not as a percentage. b. What are the highest and lowest of those scores?
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