SOLUTION: The average life of a certain battery is 5 years, with a standard deviation off year. Assume that the life of the battery approximately follows a normal distribution. Find the prob
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Question 1208020: The average life of a certain battery is 5 years, with a standard deviation off year. Assume that the life of the battery approximately follows a normal distribution. Find the probability that the average life of a random sample of size 16 of such batteries will be w
a. between 4.5 and 5.4 years
b. less than 5.5 years
c. more than 4.75 years Answer by math_tutor2020(3816) (Show Source):
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The portion that says "with a standard deviation off year" appears to have a typo.
I have a feeling the "off" should be "of" and it should instead say something like "standard deviation of ____ year(s)" where a number will go in the blank.
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