ExperimentsMisc AP Statistics Jeopardy Sampling Credits

Sampling Answer A marketing company offers to pay $25 to the first 100 persons who respond to their advertisement and complete a questionnaire regarding displays of their client’s product. This situation is an example of which of the following? a.) simple random sample b.) convenience sample c.) voluntary response sample d.) multistage cluster sample e.) None of these

Sampling Answer A simple random sample was selected of large urban school districts throughout New England. The selected districts were identified as target districts. Within each district, a simple random sample of its high schools was chosen and the principals of those high schools was chosen and the principals of those high schools were interviewed. Which of the following statements regarding this design is not true. a.) This is an example of a multi-stage cluster sample b.) Results from the interviews cannot be used to infer responses of the population of interest c.) The population of interest is the set of all high school principals in New England d.) Not every subset of principals has the same chance of selection e.) All of these statements are true.

Sampling Answer The student council of your high school wants to conduct a survey regarding the dress code for school dances. You have advised them that it might be best to conduct a stratified random sample of the student body. Which of the following is not a valid stratified design? Assume the result of the separate samples will be combined into a single sample of the student body. a.) Two simple random samples are to be conducted: one of the boys in the student body and the other of the girls in the student body. b.) Four simple random samples are conducted: one in each of the four classes c.) Two simple random samples are conducted in randomly selected homerooms: one of the boys in the selected homerooms and the other of the girls in the selected homerooms. d.) Twoo random samples are conducted: one of students whose GPA’s are 2.5 or higher and the other of students whose GPA’s are less than 2.5 e.) None of these statements is a valid design

Sampling Answer Use the following excerpt from a random digit table: Which of the following statements regarding this excerpt of the given random digit table is true? a.) this table can only be used for data coded with five-digit numbers b.) In order to use this table for a population of 100 names, the names could be coded 00-99; the random two-digit numbers would be selected to identify chosen names c.) It is critical to begin the selection of random digits at the beginning of the list d.) This table can only be used if the data labels include all of the digits in the table. e.) None of these statements are true.

Sampling Answer If the personnel director at a large company wanted to study the eating habits of employees at lunchtime and includes only the employees in one department in her study, she is performing a a.) simple random sample b.) quota sample c.) convenience sample d.) multi-stage cluster sample e.) census

Sampling Answer Which of the following is not a valid sample design? a.) Code every member of a population and select 100 randomly chosen members. b.) Divide a population by gender and select 50 individuals randomly from each group. c.) Select individuals randomly and place into gender groups until you have the same proportion in the groups as in the population. d.) Select five homerooms at random from all of the homerooms in a large high school e.) All of these are valid

Sampling Answer Answer c.) voluntary response sample

Sampling Answer Answer Answer: b.) Results from the interviews cannot be used to infer responses of the population of interest

Sampling Answer Answer C: This is a multi-stage sample

Sampling Answer Answer b.) In order to use this table for a population of 100 names, the names could be coded 00-99; the random two-digit numbers would be selected to identify chosen names

Sampling Answer Answer c.) a convenience sample

Sampling Answer Answer e.) all of these are valid

Experiments Answer Which one of the following statements about experiments is true? a.) All experiments must have a control group. b.) Blocking is employed to reduce variation c.) Random assignment is only critical for treatment groups, as opposed to control groups d.) Matching can be used in any experiment to eliminate lurking variables. e.) None of these is true.

Experiments Answer In an experiment, if two variables are confounded, which of the following statements is true? a.) One of the variables must be a lurking variable. b.) The variables will have a correlation coefficient greater than ±.5 c.) There is a clear indication that a placebo effect is present in the experiment d.) The investigator cannot separate the effect of the variables on a response variable. e.) None of these is true.

Experiments Answer Blocking is utilized to help a.) organize the treatment and control groups b.) counteract the placebo effect c.) produce groups that are as similar as possible d.) replicate the experiment within each block e.) avoid the need for randomization

Experiments Answer A randomized block design is similar to which of the following sampling designs? a.) simple random sample b.) multi-stage sample c.) stratified sample d.) convenience sample e.) systematic sample

Experiments Answer You have been given the task of determining if right-handed persons have stronger right hands than left hands. A sample of 10 right-handed persons is selected randomly. Which of the following designs would be most appropriate for this study? a.) an observational study b.) a design blocked for gender to determine if right-handed strength differs by gender c.) a repeated measures (matched pair where individual serves as their own control) experiment in which each subject represents a block wherein the strength of the right hand and the left hand is measured in random order. d.) five of the subjects are randomly placed in the control group and the other in the treatment group. All are tested and the results of each group are compared. e.) None of these is appropriate

Experiments Answer A randomized block design is not a.) similar to a stratified random sample for surveys b.) a strategy to control for an influence that would affect the outcome of the experiment c.) a strategy that depends on randomization d.) only used for gender comparisons e.) all of these describe a randomized block design.

Experiments Answer Answer b.) blocking is employed to reduce variation

Experiments Answer Answer d.) The investigator cannot separate the effect of the variables on a response variable.

Experiments Answer Answer c.) produce groups that are as similar as possible

Experiments Answer Answer c.) stratified sample

Experiments Answer Answer c.) a repeated measures (matched pair where individual serves as their own control) experiment in which each subject represents a block wherein the strength of the right hand and the left hand is measured in random order.

Experiments Answer Answer d.) only used for gender comparisons

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Miscellaneous Answer The four principles of experimental design include: a.) Control, randomization, replication, and double- blindness b.) Control, randomization, replication, and blocking c.) Control, replication, blocking, and simple random sampling d.) Control randomization, replication, and homogeneity.

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Miscellaneous Answer The four principles of experimental design include: a.) Control, randomization, replication, and double- blindness b.) Control, randomization, replication, and blocking c.) Control, replication, blocking, and simple random sampling d.) Control randomization, replication, and homogeneity. Answer: b.) control, randomization, replication, and blocking

Credits All of these questions have come from either the Test Bank for Yates, Moore, and Starnes’s The Practice of Statistics, 2e By Michael A. Flinger and William I. Notz Or Amsco’s AP Statistics James F. Bohan