Determine whether the given description corresponds to an observational 4) A mar

Question

Determine whether the given description corresponds to an observational 4) A marketing firm does a survey to find out how many study or an experiment. people use a product Of the one hundred people contacted, fifteen said they use the product A) Observational study B) Experiment 5) A dlinic gives a drug to a group of ten patients and a placebo to another group of ten patients to find out if the drug has an effect on the patients'illnes. A) Experiment B) Observational study Identify which of these types of sampling is used: random, stratified, systematic, cluster, convenience. 6) 49, 34, and 48 students are selected from the Sophomore, Junior, and Senior lasses with 496, 343, and 481 A) Stratified B) Random C) Convenience D) Cluster E) Systematic 7) A sample consists of every 49th student from a group of 496 students. A) Systematic B) Cluster C) Convenience D) Random E) Stratified 8) To avoid working late, a quality control analyst simply inspects the first 100 items produced in a day B) Stratified C) Random D) Cluster 9) An education researcher randomly selects 48 middle schools and interviews all the teachers at each school. A) Systematic B) Random C) Convenience D) Stratified E) Cluster 10) The name of each contestant is written on a separate card, the cards are placed in a bag, and three names are picked from the bag. A) Cluster B) Stratified C) Convenience D) Systematic E) Random Identify the type of observational study (cross-sectional, retrospective, prospective). 11) A statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years D) None of these A) Prospective C) 12) A researcher plans to obtain data by following those in cancer remission since January of 2005. D) None of these 13) A town obtains current employment data by polling 10,000 of its citizens this month B) Retrospective A) Prospective C) Cross-sectional D) None of these

Explanation / Answer

4) Experiment

5) Observational study

6) Stratified

7) Systematic

8) Convenience

9) Random

10) Random

11) Retrospective

12) Retrospective

13) Prospective

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