The lifetime of a DVD player is normally distributed with a mean of 8 years and a standard deviation of 38 months. What is the probability that the DVD player that you just bought will last longer than 12 years (144 months) (please round your answer to 4 decimal places)
Added by Tanya T.
Step 1
First, we need to convert the standard deviation from months to years. There are 12 months in a year, so we divide 38 by 12: $$\frac{38}{12} \approx 3.167$$ years. Show more…
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