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Company KY1 know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 14.9 years and a standard
Company KY1 know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 14.9 years and a standard deviation of1.8 years. If the company wants to provide a warranty so that only EL???- of the quartz time pieces will be replaced before the warranty expires, what is the time length of the warranty? warranty = yea rs 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. Ch eck
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