Download PDF by R. Lyman Ott, Micheal T. Longnecker: An Introduction to Statistical Methods and Data Analysis

By R. Lyman Ott, Micheal T. Longnecker

ISBN-10: 0534251226

ISBN-13: 9780534251222

Data is a concept method. during this finished advent to statistical equipment and information research, the method is gifted using a four-step process: 1) collecting info, 2) summarizing info, three) examining facts, and four) speaking the result of information analyses.

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Ag. 5 A state department of agriculture wants to estimate the number of acres planted in corn within the state. How might one conduct such a survey? Pol. Sci. 6 A political scientist wants to estimate the proportion of adult residents of a state who favor a unicameral legislature. What could be sampled? Also, discuss the relative merits of personal interviews, telephone interviews, and mailed questionnaires as methods of data collection. 7 Discuss the relative merits of using personal interviews, telephone interviews, and mailed questionnaires as data collection methods for each of the following situations: a.

A consumer testing agency decides to evaluate the wear characteristics of four major brands of tires. For this study, the agency selects four cars of a standard car model and four tires of each brand. The tires will be placed on the cars and then driven 30,000 miles on a 2-mile racetrack. The decrease in tread thickness over the 30,000 miles is the variable of interest in this study. Four different drivers will drive the cars but the drivers are professional drivers with comparable training and experience.

What types of biases may be introduced into each of the surveys? Edu. 10 Time magazine, in a late 1950s article, stated that ‘‘the average Yaleman, class of 1924, makes $25,111 a year,’’ which, in today’s dollars, would be over $150,000. Time’s estimate was based on replies to a sample survey questionnaire mailed to those members of the Yale class of 1924 whose addresses were on file with the Yale administration in late 1950. a. What is the survey’s population of interest? b. Were the techniques used in selecting the sample likely to produce a sample that was representative of the population of interest?

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An Introduction to Statistical Methods and Data Analysis by R. Lyman Ott, Micheal T. Longnecker


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