midterm2 - Econ 3818 Midterm 2 Use the following to answer...

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Econ 3818 Midterm 2 Name: Use the following to answer questions 1 – 2. A state official wants to know which party the voters in his state feel is best qualified to lead the country over the next 10 years. He mails a questionnaire on this subject to a SRS of 1600 voters in his state. His staff reports that 325 questionnaires have been returned, of these 241 respondents feel the Democratic Party is best qualified to lead the country over the next 10 years. 1 . The population is a. the 1600 voters receiving the questionnaire. b. the 325 questionnaires returned. c. the 241 voters who feel the Democratic party is best qualified. * d. the voters in his state. 2 . The sample is a. the voters in his state. * b. the 325 questionnaires returned. c. the 241 voters who feel the Democratic party is best qualified. d. the 1600 voters receiving the questionnaire. Use the following to answer questions 3 – 4. An industrial psychologist is interested in studying the effect of room temperature and humidity on the performance of tasks requiring manual dexterity. She chooses three temperatures of 65 degrees Fahrenheit, 80 degrees Fahrenheit and 95 degrees Fahrenheit with humidity of 60% and 80%. The response variable measured is the number of correct insertions, during a 15-minute period using a peg-and-hole apparatus requiring the use of both hands simultaneously. After each subject is trained on the apparatus, he or she is asked to make as many insertions as possible in a 15-minute period. Sixty factory workers used to doing repetitive tasks are randomly assigned to the different temperature and humidity combinations. 3 . The experimental units in this experiment are a. the number of correct insertions. b. the 15-minute interval. * c. the factory workers. d. the peg-and-hole apparatus.
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