Question 10 > Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed wi

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Question 10 Company Xyz Know That Replacement Times For The Quartz Time Pieces It Produces Are Normally Distributed Wi 1 (169.25 KiB) Viewed 19 times

Question 10 > Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 16.8 years and a standard deviation of 2.1 years. Find the probability that a randomly selected quartz time piece will have a replacement time less than 11.8 years? P(X < 11.8 years) = Enter your answer accurate to 4 decimal places. Answers obtained using exact z-scores or Z-scores rounded to 3 decimal places are accepted. If the company wants to provide a warranty so that only 3.7% of the quartz time pieces will be replaced before the warranty expires, what is the time length of the warranty? warranty = years Enter your answer as a number accurate to 1 decimal place. Answers obtained using exact z-scores or Z-scores rounded to 3 decimal places are accepted.