Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $31,000 and a standard deviation of $3,000. (show all work) a) Find the probability that the mean salary of 100 randomly selected elementary school teachers in the United States is less than $30,500. b) Find the probability that the mean salary of 50 randomly selected elementary school teachers in the United States is greater than $31, 800. c) Find the probability that the mean salary of 80 randomly selected elementary school teachers in the United States is between $30,000 and $32,000
Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $31,000 and a standard deviation of $3,000. (show all work) a) Find the probability that the mean salary of 100 randomly selected elementary school teachers in the United States is less than $30,500. b) Find the probability that the mean salary of 50 randomly selected elementary school teachers in the United States is greater than $31, 800. c) Find the probability that the mean salary of 80 randomly selected elementary school teachers in the United States is between $30,000 and $32,000
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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Assume that the salaries of elementary school teachers in the United States are
a) Find the
b) Find the probability that the mean salary of 50 randomly selected elementary school teachers in the United States is greater than $31, 800.
c) Find the probability that the mean salary of 80 randomly selected elementary school teachers in the United States is between $30,000 and $32,000
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