Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 11.5 years and a standard deviation of 1.2 years. Find the probability that a randomly selected quartz time piece will have a replacement time less than 9.1 years? Enter your answer accurate to 4 decimal places. P(X 9.1 years) = If the company wants to provide a warranty so that only 0.9% of the quartz time pieces will be replaced before the warranty expires, what is the time length of the warranty? Enter your answer in years, rounded to one decimal place warranty = years
Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 11.5 years and a standard deviation of 1.2 years. Find the probability that a randomly selected quartz time piece will have a replacement time less than 9.1 years? Enter your answer accurate to 4 decimal places. P(X 9.1 years) = If the company wants to provide a warranty so that only 0.9% of the quartz time pieces will be replaced before the warranty expires, what is the time length of the warranty? Enter your answer in years, rounded to one decimal place warranty = years
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed
with a mean of 11.5 years and a standard deviation of 1.2 years.
Find the probability that a randomly selected quartz time piece will have a replacement time less than 9.1
years? Enter your answer accurate to 4 decimal places.
P(X 9.1 years) =
If the company wants to provide a warranty so that only 0.9% of the quartz time pieces will be replaced
before the warranty expires, what is the time length of the warranty? Enter your answer in years, rounded
to one decimal place
warranty =
years
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