Suppose that the average outstanding credit card balance for young professionals is 11,200 with a standard deviation of 2,600. In a simple random sample of 150 young professionals, what is the...

Suppose that the average outstanding credit card balance for young professionals is 11,200 with a standard deviation of 2,600. In a simple random sample of 150 young professionals, what is the probability that the mean outstanding credit card balance does not exceed 12,300.