lenovo ti X ooks/9780357118191/cfi/469!/4/4@0.00:44.6 showed a per person annual expenditure for prescription drugs of $745. Use a popula- tion standard deviation of $300 to answer the following questions. a. Formulate hypotheses for a test to determine whether the sample data support the conclusion that the population annual expenditure for prescription drugs per person is lower in the Midwest than in the Northeast. r b. What is the value of the test statistic? What is the p-value? d. At a = .01, what is your conclusion? 21. Cost of Telephone Surveys. Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. A sample of 35 surveys provided the survey times shown in the file Fowle. Based upon past studies, the population standard deviation is assumed known witho = 4 minutes. Is the premium rate justified? a. Formulate the null and alternative hypotheses for this application. b. Compute the value of the test statistic. c. What is the p-value? d. At a = .01, what is your conclusion? 22. Time in Supermarket Checkout Lines. CCN and ActMedia provided a television channel targeted to individuals waiting in supermarket checkout lines. The channel showed news, short features, and advertisements. The length of the program was based on the assumption that the population mean time a shopper stands in a super- market checkout line is 8 minutes. A sample of actual waiting times will be used to test this assumption and determine whether actual mean waiting time differs from this standard. a. Formulate the hypotheses for this application. b. A sample of 120 shoppers showed a sample mean waiting time of 8.4 minutes. We've updat 2 miniatac Whnt is tha n ual 中 Aa ntinn ctandard davintion of A ccum 12 GP

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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.