A survey was made of 100 customers in a department store. Sixty of the 100 indicated they visited the store because of a newspaper advertisement.The remainder had not seen the ad. A total of 40 customers made purchases; of these customers, 30 had seen the ad. (a) what is the probability that a person who did not see the ad made a purchase? (b) what is the probability that a person who saw the ad made a purchase?
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.
A survey was made of 100 customers in a department store. Sixty of the 100 indicated they visited the store because of a newspaper advertisement.The remainder had not seen the ad. A total of 40 customers made purchases; of these customers, 30 had seen the ad.
(a) what is the probability that a person who did not see the ad made a purchase?
(b) what is the probability that a person who saw the ad made a purchase?
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