1. What is the probability of X- lying between 49 and 50 for a random sample of 36 from a population with µ = 48 and O = 12?
2. What is the probability that the mean for a random sample of 144 accounts receivable drawn from a population of 2000 accounts with a mean of $10,000 and a standard deviation of $4000 will be between $9500 and $10,500?