Multiple choices 48/50
(Choose 1 answer)
A. 0.9616
B. 0.0384
C. None of the other choices is correct
D. 0.8944
E. 0.1056
An electrical firm manufactures a certain type of light bulb that has a mean light of 1,800 hours and a standard deviation of 200 hours. Find the probability that a random sample of 100 bulbs will have an average life of more than 1,825 hours.
Let P(Z < -1.77) = 0.0384, P(Z < -1.25) = 0.1056, P(Z < 1.25) = 0.8944 and P(Z < 1.77) = 0.9616.
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