Teenage Marketing In a certain year, 21% of all teenagers in the United States had checking accounts. Your bank, TeenChex Inc., is interested in targeting teenagers who do not already have a checking account. (a) If TeenChex selects a random sample of 2,000 teenagers, what number of teenagers without checking accounts can it expect to find? teenagers What is the standard deviation o of this number? (Round the standard deviation to one decimal place.) (b) Fill in the missing quantities. (Round your answers to the nearest integer.) There is an approximately 95% chance that between and teenagers in the sample will not have checking accounts.

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