T
tammy
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PROBLEM ONE: Suppose that 20% of the subscribers of a cable television company watch the shopping channel at least once a week. The cable company is trying to decide whether to replace this channel with a new local station. A survey of 100 subscribers will be undertaken. The cable company has decided to keep the shopping channel if the sample proportion is greater than .25. What is the approximate probability that the cable company will keep the shopping channel, even though the true proportion who watch it is only. .20?
PROBLEM TWO: The amount of money spent by a customer at a discount store has a mean of $100 and a standard deviation of $30. What is the probability that a randomly selected group of 50 shoppers will spend a total of more than $5300? (HINT: The total will be more than $5300 when the sample average exceeds what value?)
thank you thank you thank you!!!
PROBLEM TWO: The amount of money spent by a customer at a discount store has a mean of $100 and a standard deviation of $30. What is the probability that a randomly selected group of 50 shoppers will spend a total of more than $5300? (HINT: The total will be more than $5300 when the sample average exceeds what value?)
thank you thank you thank you!!!