Teenage Marketing   In a certain year, 24% 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 ? 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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Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.