Question: 7.44 Let x be a continuous random variable that has a normal distribution with 75 and 14. Assuming nN .05,

7.44 Let x be a continuous random variable that has a normal distribution with 75 and 14. Assuming nN .05, find the probability that the sample mean, for a random sample of 20 taken from this population will be

a. between 68.5 and 77.3

b. less than 72.4

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