Test Bank For Statistical Reasoning for Everyday Life 5th Edition By Jeff Bennet, William Briggs, Mario Triola (All Chapters Included)

Test Bank For Statistical Reasoning for Everyday Life 5th Edition By Jeff Bennet, William Briggs, Mario Triola (All Chapters Included) 15) A marketing firm does a survey to find out how many people use a product. Of the 100 peop le contacted, 15 said they use the product. A) Observational B) Experimental 16) Two samples of fish are taken from a river upstream and downstream of a factory to measure the effe ct of pollution from the factory on the fish. A) Observational B) Experimental 4 . 17) A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. S he randomly assigns half of a group of overweight people to a treatment group who are given the her b with instructions for its use and a planned diet for six weeks. The other half of the group is given parsley with the same instructions and same diet. A nurse at the nutrition center weighs each subject o n Friday of each week. Select the potential source of confounding. A) The placebo effect B) Experimenter effect C) Method of assignment to treatment and control groups D) The study is essentially free of potential confounding. 18) Select the most appropriate type of study for the question: Which is the best fertilizer for Mr. Jimenez ’s backyard grass? A) Experimental B) Experimental blinded C) Double-blind D) Observational 19) Which data provide the answer to the question: “How many times a week do students at Eurek a College study more than three hours a day?” A) Of 100 students surveyed, 43 reported that they study at least three hours a day on Saturdays an d Sundays. B) Of 100 students surveyed, 43 reported that they have studied at least three hours a day. C) Of 100 students surveyed, 43 reported that they studied at least three hours a day twice last week. D) Of 100 students surveyed, 43 reported that they intend to study at least three hours a day ne xt week. 20) Determine which evaluation guideline applies best in questioning the results of the described study: A homeowner put a brandname fertilizer/weed killer on half of his lawn and a generic fertilizer/weed killer on the other half. A fter three weeks, the generic side had 1 weed per square meter, the other side had 1.7 weeds per squar e meter. The generic side required two mowings in the 3 weeks, the brandname side one. The homeowner concluded that the generic was superior to the brand name. A) Consider possible confounding variables. B) Consider the sample. C) Consider the type of study. D) Consider the source. 5 . Statistical Reasoning for Everyday Life Chapter 1 (Speaking of Statistics) Exam, form B MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. For problems 1 and 2, determine whether the evaluated group is a population or a sample. 1) A researcher determines that 42.7% of all downtown office buildings have ventilation problems. A) Population B) Sample 2) After taking the first exam, 15 students dropped the class. A) Population B) Sample For problems 3 and 4, determine whether the given value is a statistic or a parameter. 3) A researcher determines that 42.7% of all downtown office buildings have ventilation problems. A) Statistic B) Parameter 4) After taking the first exam, 15 students dropped the class. A) Statistic B) Parameter 5) One month before a recall election, a poll of 500 Wisconsin voters showed that 46% planned to vote for the Democratic challenger Tom Barrett and 45% planned to vote for Republican Governor Scott Walker. Undecided voters constituted another 9%. The margin of error was 5 percentage points. Wh at conclusion can you draw from this poll? A) Barrett will win the election B) Walker can’t get over 50% of the votes C) The race is too close to call D) No one will win 6 . 6) A U.S. government report stated that, “With bank interest rates around 1.0%, 8% of wage earners bel ieve it worthwhile to keep money in a savings account. However, at 3.0% interest, 36% of wage earn ers believe it worthwhile to keep money in a savings account. The margin of error for both studies is 4 percentage points.” A proper conclusion from the studies is that A) increasing the interest rate from 1% to 3% will increase the number of persons saving money in a savings account. B) increasing the interest rate may well have no effect on the number of persons saving money in a savings account. C) increasing the interest rate will increase the number of persons saving money in a saving s account. D) the interest rate difference between 1% and 3% may well havefino effect on the number of perso ns saving money in a savings account. For problems 9 and 10, determine whether the statement is based on census data or sample data. 7) Among 50 of the total of 302 patients admitted to an emergency room during one month, 28% had n o health insurance. A) Census data B) Sample data 8) A researcher surveyed every fifth male entering a florist’s shop on the day before Mother’s Day and found that 53% of them were married. A) Census data B) Sample data For problems 11 and 12, select the most representative sample of the population of interest. 9) An employer wanted to determine the importance of health insurance as a benefit to employees. A) A group of thirty employees of the company B) A group of 300 union members work at the company C) A group of 30 employees from the company who had medical treatment in the past year D) A group of thirty potential employees at the state office of employment 10) A researcher wants to determine the status of the electorate one month before the presidential electio n. Select the sample most likely to produce biased data. A) A random group of 30 persons in the phone book B) A group of 30 persons contacted by phone with the numbers randomly chosen C) A group of 30 persons from the researcher’s birding club who voted in the last election D) A group of 30 persons on the voter registration list For problems 13 and 14, identify the sampling techniques used. 11) A market researcher selects 300 female soccer players and 300 male soccer players. A) Random B) Cluster C) Stratified D) Convenience E) Systematic 12) A researcher interviews the first 19 colleagues who work in his building as they left work. A) Random B) Cluster C) Stratified D) Convenience E) Systematic