(Choose 1 answer)
The amount of time required for an oil and filter change on an automobile is normally distribu of 45 minutes and a standard deviation of 10 minutes. A random sample of 16 cars is selecte probability that the sample mean is between 45 and 52 minutes?
Let P(Z < 0) = 0.5, P(Z < 2.8) = 0.9974, P(Z < 3.2) = 1 and P(Z < -1) = 0.3974.
A. 0.6974
B. 0.5974
C. 0.3974
D. 0.4974
E. None of the other choices is correct
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