Out of a random sample they found that 9.72% of the parts lengths was more than 7.4 inches and 7.78% of the p
Out of a random sample they found that 9.72% of the parts lengths was more than 7.4 inches and 7.78% of the p
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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A parts fabrication company is trying to decide if they need to replace one of the machines that produces a part. It is known that the length of the part is normally distributed. Out of a random sample they found that 9.72% of the parts lengths was more than 7.4 inches and 7.78% of the parts were less than 6.9 inches.
What is the mean length of the part?
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