The average annual salary for all U.S. teachers is 47,750. Assume that the distribution is normal and the standard deviation is $5,680. find the probability that a ramdmly selected teacher earns a. between 35,000 and 45,000 a year b. more than $40,000 a year

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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The average annual salary for all U.S. teachers is 47,750. Assume that the distribution is normal and the standard deviation is $5,680. find the probability that a ramdmly selected teacher earns

a. between 35,000 and 45,000 a year

b. more than $40,000 a year 

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