In 2000, 30 percent of all teenagers in some country had checking accounts. Your bank, TeenChex Inc., is interested in targeting teenagers who do not already have a checking account.

TeenChex selects a random sample of 1,000 teenagers. Find the number of teenagers without checking accounts it can expect.
$\mu =$ __________

Find the standard deviation of this number. Please, round your answer to one decimal place.
$\sigma =$ __________

Fill in the missing quantities. Please round answers to the nearest whole number.

There is an approximately 95 percent chance that between __________ and __________ teenagers in the sample will not have checking accounts.

Question

In 2000, 30 percent of all teenagers in some country had checking accounts. Your bank, TeenChex Inc., is interested in targeting teenagers who do not already have a checking account.
​
TeenChex selects a random sample of 1,000 teenagers. Find the number of teenagers without checking accounts it can expect.
​ $\mu =$ __________
​
Find the standard deviation of this number. Please, round your answer to one decimal place.
​ $\sigma =$ __________
​
Fill in the missing quantities. Please round answers to the nearest whole number.
​
There is an approximately 95 percent chance that between __________ and __________ teenagers in the sample will not have checking accounts.

Quizplus · Accepted Answer

The Answer of In 2000, 30 percent of all teenagers in some country had checking accounts. Your bank, TeenChex Inc., is interested in targeting teenagers who do not already have a checking account.
​
TeenChex selects a random sample of 1,000 teenagers. Find the number of teenagers without checking accounts it can expect.
​ $\mu =$ __________
​
Find the standard deviation of this number. Please, round your answer to one decimal place.
​ $\sigma =$ __________
​
Fill in the missing quantities. Please round answers to the nearest whole number.
​
There is an approximately 95 percent chance that between __________ and __________ teenagers in the sample will not have checking accounts.

In 2000, 30 Percent of All Teenagers in Some Country μ=\mu =μ=

In 2000, 30 Percent of All Teenagers in Some Country $\mu =$