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Ebook Statistics for business and economics (11/E): Part 2

(BQ) Part 2 book “Statistics for business and economics” has contents: Tests of goodness of fit and independence, simple linear regression, multiple regression, index numbers, nonparametric methods, statistical methods for quality control, statistical methods for quality control, and other contents. | Find more at www.downloadslide.com CHAPTER 12 Tests of Goodness of Fit and Independence CONTENTS STATISTICS IN PRACTICE: UNITED WAY 12.1 GOODNESS OF FIT TEST: A MULTINOMIAL POPULATION 12.2 TEST OF INDEPENDENCE 12.3 GOODNESS OF FIT TEST: POISSON AND NORMAL DISTRIBUTIONS Poisson Distribution Normal Distribution Find more at www.downloadslide.com Statistics in Practice STATISTICS 473 in PRACTICE UNITED WAY* ROCHESTER, NEW YORK United Way of Greater Rochester is a nonprofit organization dedicated to improving the quality of life for all people in the seven counties it serves by meeting the community’s most important human care needs. The annual United Way/Red Cross fund-raising campaign, conducted each spring, funds hundreds of programs offered by more than 200 service providers. These providers meet a wide variety of human needs— physical, mental, and social—and serve people of all ages, backgrounds, and economic means. Because of enormous volunteer involvement, United Way of Greater Rochester is able to hold its operating costs at just eight cents of every dollar raised. The United Way of Greater Rochester decided to conduct a survey to learn more about community perceptions of charities. Focus-group interviews were held with professional, service, and general worker groups to get preliminary information on perceptions. The information obtained was then used to help develop the questionnaire for the survey. The questionnaire was pretested, modified, and distributed to 440 individuals; 323 completed questionnaires were obtained. A variety of descriptive statistics, including frequency distributions and crosstabulations, were provided from the data collected. An important part of the analysis involved the use of contingency tables and chisquare tests of independence. One use of such statistical tests was to determine whether perceptions of administrative expenses were independent of occupation. The hypotheses for the test of independence were: H0: .