Company XYZ know that replacement times for the portable MP3 players it produces are normally distributed with a mean of 4 years and a standard deviation of 1 years. Find the probability that a randomly selected portable MP3 player will have a replacement time less than 0.8 years? P(X < 0.8 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 3.5% of the portable MP3 players 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.
Company XYZ know that replacement times for the portable MP3 players it produces are
Find the
P(X < 0.8 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 3.5% of the portable MP3 players 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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