Suppose that the average outstanding credit card balance for your professionals is P11,200 with a standard deviation of P2,600. In a simple random sample of 150 young professionals, what is the probability that the mean outstanding credit card balance does not exceeds P11,800?
Let X be a random variable representing he mean outstanding credit card balance of 150 young professionals, then, according to the central limit theorem, X ~
(We found P using z-score table)
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