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.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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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.)
O =
(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.
Transcribed Image Text: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.) O = (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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