Mathematics, 08.02.2021 19:10, rosetoheart2
The lifetimes of a certain brand of light bulbs are known to be normally dsitributed with a mean of 1700 hours and standard deviation of 400 hours. A random sample of 64 of these light bulbs is taken. The probability is 0.20 that the sample mean lifetime is more than how many hours?
A. 1652.
B. 1725.
C. 1752.
D. 1670.
Answers: 2
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Determine the quotient of the following expression. (15n^2-27n) / 3
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Which of the following values are in the range of the function graphed below? check all that apply ! - will give the answer "brainliest! "
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