To determine the effect their salespeople have on purchases, a department store polled 700 shoppers regarding whether or not they made a purchase and whether or not they were pleased with the service they received. Of those who made a purchase, 141 were happy with the service and 123 were not. Of those who made no purchase, 211 were happy with the service and 225 were not. Use probability rules (when appropriate) to find the probability of the event stated. (Enter your answers as fractions.) (a) A shopper was happy with the service received. (b) A shopper was unhappy with the service received.
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.
To determine the effect their salespeople have on purchases, a department store polled 700 shoppers regarding whether or not they made a purchase and whether or not they were pleased with the service they received. Of those who made a purchase, 141 were happy with the service and 123 were not. Of those who made no purchase, 211 were happy with the service and 225 were not. Use probability rules (when appropriate) to find the probability of the
(a) A shopper was happy with the service received.
(b) A shopper was unhappy with the service received.
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