HmwkQs - Homework 1 Question Consider the set-up in problem...

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Unformatted text preview: Homework 1 Question Consider the set-up in problem 1.6 on page 16. What is the population the researcher is interested in for this study? Answer 340 members of a local chain of prenatal fitness clubs 60 women selected at random 21 women who returned the questionnaire pregnant women Question Consider Example 3 on page 7. In order to make this an experiment, we would have to: Answer Force some of the children to have Leukemia and others not to. Force some of the students to be exposed to magnetic fields and others not to. Use randomness in some manner. It is already an experiment. Question Consider Example 3 on page 7. Which of the following is NOT a variable in the study? Answer The 1258 children studied Whether the children had Leukemia The magnetic field strength in each house The distance to nearby power-lines for the mother's residence when she was pregnant. Homework 2 Question "The Gamecock" is interested in what percentage of adult South Carolians favor allowing the gas tax to increase with gas prices (instead of always being fixed). They have access to a list of registered voters in the state from an earlier article and decide to use that to select their sample from. They choose 400 names at random to contact. Of those 150 respond to their question. 68 of the 150 are in favor of the increase. The sample is: Answer Adult South Carolinians Registered Voters in SC The 68 who were "in favor" The 150 who responded The 400 who were chosen to contact Question A volunteer for an exit poll at an election is trying to estimate the percentage of voters that voted for a certain candidate before the polls close. To do this they randomly stop some of the people leaving the polling place and ask them how they voted. Which of the following is more likely to lead to the volunteer getting biased results? Answer The volunteer gets distracted a lot and misses asking some of the people they were supposed to. The more conservative voters are more likely to say they don't want to answer than the more liberal voters. Homework 3 Question Consider the list of 27 departments in Question 1.4 on page 184. Which of the following would NOT work as a way to number them to use the random number table? ("..." means keep numbering in the obvious way.) Answer 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, ... 25, 26 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ... 26, 27 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, ... 26, 27 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, ... 36, 37 Question Consider the list of departments in Question 1.4 on page 184. Numbering them in alphabetical order beginning with 01, use line 120 in Table A to select a random sample of size 3. The third department chosen is: Answer Architecture Biology International Studies Music Sociology Question "The Gamecock" is interested in what percentage of adult South Carolinians favor allowing the gas tax to increase with gas prices (instead of always being fixed). They have access to a list of registered voters in the state from an earlier article and decide to use that to select their sample from. the state from an earlier article and decide to use that to select their sample from....
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HmwkQs - Homework 1 Question Consider the set-up in problem...

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