49
Answer (Choose 1 answer)
A. 37.3
B. None of the other choices is correct
C. 47.3
D. 17.3
Ε. 27.3
A supermarket manager has determined that the amount of time customers spend in the supermarket is approximately normally distributed with a mean of 45 minutes and a standard deviation of 6 minutes. Find the number of minutes, m, for which the probability that a customer spends less than m minutes in the supermarket is 0.10.
Let P(Z < -1.28) = 0.1, P(Z < 0) = 0.5 and P(Z < 1) = 0.8.
