Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 16.2 years and a standard deviation of 1 years.Find the probability that a randomly selected quartz time piece will have a replacement time less than 13.8 years?P(X < 13.8 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 2.5% of the quartz time pieces will be replaced before the warranty expires, what is the time length of the warranty?warranty = ________ yearsEnter 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.
Company XYZ know that replacement times for the quartz time pieces it produces are
Find the
P(X < 13.8 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 2.5% 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.
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