Name: A 12. To conduct a survey about the people of Wisconsin, 100 people were chosen from each county based on a recent census. a. Bias b. Non bias 13. Twenty men and 20 women with migraine headaches were subjects in an experiment to determine the effectiveness of a new pain medication. Ten of the 20 men and 10 of the 20 women were chosen at random to receive the new drug. The remaining 10 men and 10 women received a placebo. The decrease in pain was measured for each subject. The design of this experiment is a. Systematic Sample Design b. Completely Randomized Design c. Matched Pairs Design d. Block Design 14. A professor wants to study the effectiveness of a new study tool for a course. There are 150 students registered for the course. The professor assigns each student a number from 1 to 150 and uses a random number generator to assign the first 75 students selected to use the new study tool. The remaining 75 subjects are assigned to use the previous study tool. What type of experiment design is this? a. Matched Pairs Design b. Block Design c. Completely Randomized Design 15. A company makes a bracelet containing magnets that they claim improves balance and overall athletic performance. Researchers recruit volunteers for an experiment. The subjects will test the effectiveness of the bracelet by performing a variety of athletic challenges with and without the bracelet. Each subject will do each challenge 3 times: wearing the actual bracelet, wearing a placebo bracelet, and wearing no bracelet at all. The order will be randomized for each activity, subjects won't know which bracelet is which. Why did the researchers include the scenario where subjects wear no bracelet at all? A. To control against nonresponse B. To serve as a control group for comparison C. To correct for using volunteers instead of a random sample D. To utilize a random cluster designName: A 16. An experiment is when both the researcher and the subjects of the experiment do not know who received the treatment. a. Blind b. Biased c. Double Blind d. an Observational Study 17. A sample of n = 14 pairs of identical twins are volunteers in an experiment studying the benefits of exercise on resting heart rate. What is the most appropriate design for this experiment? Completely Randomized Design b. Block Design c. Matched Pairs Design 18. Which of the following uses every member of the population to obtain data? a. A census b. An experiment c. An observational study d. A sample survey 19. A study compared paired daytime and nighttime counts of sea trout, lake trout, and rainbow trout made by the same divers in six lakes during September 2015. Overall, they counted 127 trout during the day and 356 trout at night. The researchers speculate that trout counted at night were present during the daytime, but were hidden from view. Biologists should consider that trout behavior and susceptibility to being seen might vary a great deal between daytime and nighttime, even during the summer. In some lakes, the majority of trout may not be seen during the daytime. Determine whether the study is an observational study or an experiment. Justify your answer with specific references to the information in the study. A. Observational study, because the divers are not catching trout for a sample B. Experimental study, because the divers are catching trout for a sample C. Observational study, because the divers are watching the trout only during the day D. Experimental study, because the divers are watching the trout during the day and night1. Administrators at Riverview High School surveyed a random sample of 100 of their 6. A principal orders t-shirts and wants to check some of them to make sure they were seniors to see how seniors at the school felt about the lunch offering at the school's printed properly. She randomly selects 2 of the 10 boxes of shirts and checks every cafeteria. Identify the population and sample in this setting. shirt In those 2 boxes. What type of sample is this? a. The population is all students at Riverview High; the sample is all of the seniors at a. Stratified Random Sample Riverview High b. Simple Random Sample The population is all seniors at Riverview High; the sample is the 100 seniors Cluster Random Sample surveyed None of These c. The population is all high school seniors in the world; the sample is all of the seniors at Riverview High. 7. A school chooses 3 randomly selected athletes from each of its sports teams to d. None of these options are correct participate in a survey about athletics at the school. What type of sample is this? a. Simple Random Sample 2. The average salary of all assembly-line employees at a certain car manufacturer is b. Cluster Random Sample $33,000. Is this a parameter or statistic? c. Stratified Random Sample Parameter because the average was taken from the sample d. Systematic Random Sample b. Parameter because the average was taken from the entire population Vc Statistic because the average was taken from the sample 8. A teacher puts students' names in a hat and chooses without looking to get a sample d. Statistic bec erage was taken from the entire population of 3 students. What type of sample is this? a. Stratified Random Sample 3. A recent survey by the alumni of a major university Indicated that the average salary Voluntary Response Sample of 10,000 of its 300,000 graduates was 125,000. Cluster Random Sample a. Parameter because the average was taken from the sample Simple Random Sample Statistic because the average was taken from the entire population Parameter because the average was taken from the entire population 9. Mrs. Regan surveys students asking how many of them have cheated on a math test. d. Statistic because the average was taken from the sample What kind of bias will likely result from this method? a. Response Blas 4. The temperatures (in degrees Celsius) of water taken at various depths in a large lake b. Non-response Bias are: 14.4 C. 13.3 C. 123 C. 14.4 C, 17.9 C, 15.4 C c. Voluntary Response Bias Are the data qualitative (categorical) or quantitative? a Qualitative 10. A city counselor goes door to door to ask residents in the neighborhoods he represents b. Quantitative what changes they would like to see in their community. Since he completes his rounds midday during the work week, he does not get the input of residents who 5. A researcher polls people as they walk by on the street. What type of sample is this? work. What type of bias does this represent? a. Stratified Random Sample a. Undercoverage b. Cluster Random Sample b. Non-response Bias Convenience Sample c. Response Bias Simple Random Sample 1 1. You want to know your town's favorite fast-food restaurant. You randomly ask 30 people their preference as they leave a Mcdonald's restaurant. Bias b. Not blas