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Experimental Design Into to Statistics Jeopardy Sampling Credits

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Sampling Answer 49, 34, and 48 students are selected from the sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively a.) Stratified b.) Random c.) Cluster d.) Systematic e.) Convenience

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Sampling Answer A sample consists of every 49th student from a group of 496 students. a.) Stratified b.) Random c.) Cluster d.) Systematic e.) Convenience

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Sampling Answer A pollster uses a computer to generate 500 random numbers, then interviews the voters corresponding to those numbers a.) random b.) convenience c.) cluster d.) systematic e.) stratified

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Sampling Answer To avoid working late, a quality control analyst simply inspects the first 100 items produced. This is what type of sample? a.) random b.) convenience c.) cluster d.) systematic e.) stratified

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Sampling Answer 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.) random b.) convenience c.) systematic d.) cluster e.) stratified

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Sampling Answer An education researcher randomly selects 48 middle schools and interviews all the teachers at each school a.) random b.) cluster c.) systematic d.) convenience e.) stratified

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Sampling Answer 49, 34, and 48 students are selected from the sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively a.) Stratified Students were first divided up by class (strata), then selected at random

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Sampling Answer A sample consists of every 49th student from a group of 496 students. d.) Systematic The 49 th position was randomly selected, the systematic is that each 49 th position then becomes part of the sample

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Sampling Answer A pollster uses a computer to generate 500 random numbers, then interviews the voters corresponding to those numbers a.) random Every individual in the population had an equally-likely chance of being chosen and every sample of size 500 had an equally-likely chance of being chosen

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Sampling Answer To avoid working late, a quality control analyst simply inspects the first 100 items produced. This is what type of sample? b.) convenience The first 100 were convenient to the control analyst

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Sampling Answer 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.) random Each contestant has an equally-likely chance of being chosen and each sample of size three has an equally likely chance of being chosen

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Sampling Answer An education researcher randomly selects 48 middle schools and interviews all the teachers at each school b.) cluster All the teachers in each randomly chosen school are interviewed—(the schools are natural groups within the population)

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Experimental Design Answer Determine whether the following is an observational study or an experiment a.) Observationalb.) Experiment A marketing firm does a survey to find out how many people use a product. Of the one hundred people contacted, fifteen said they use the product.

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Experimental Design Answer Determine whether the following is an experiment or an observational study a.) Observationalb.) Experiment A clinic 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 illness.

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Experimental Design Answer Which of the following is not a major principle of experimental design? a.) randomization b.) replication c.) blocking d.) control e.) all of these are important principles

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Probability Dist n Answer In order to assess the effects of diet on reducing cholesterol, a researcher randomly assigned 50 people to diet A and fifty people to diet B. They all reported to a clinic to have their cholesterol measured. The subjects were unaware of which diet they were using, and the technician measuring the cholesterol was not aware of which diet the participants had used. This is a(n) a.) observational study b.) experiment, but not a double blind experiment c.) double blind experiment d.) matched pairs experiment e.) block design

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Probability Dist n Answer An experiment was conducted by some students to explore the nature of the relationship between a person's heart rate (measured in beats per minute) and the frequency at which that person stepped up and down on steps of various heights. Three rates of stepping and two different step heights were used. A subject performed the activity (stepping at one of the three stepping rates at one of the two possible heights) for three minutes. Heart rate was then measured at the end of this period. The variables "stepping rate" and "step height" are the a.) factors b.) levels c.) controls d.) units e.) response variables

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Experimental Design Answer A study to see the effects of caffeine on college student was conducted. Students in 2 class times were part of the study. Suppose half of the 8:30 students are randomly allocated to the treatment group (two cups of coffee), the other half to the control group (two cups of decaf). In addition, half of the 9:30 students are randomly allocated to the treatment group, the other half to the control group. This is an example of a A)voluntary response study. B)stratified sampling procedure. C)matched pairs design. D)completely randomized design. E)block design.

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Exp. Design Ans. Determine whether the following is an observational study or an experiment A marketing firm does a survey to find out how many people use a product. Of the one hundred people contacted, fifteen said they use the product. a.) Observational No treatment was imposed

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Exp Design Ans. Determine whether the following is an experiment or an observational study A clinic 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 illness. b.) Experiment The patients were given either a drug or placebo then the effects were measured

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Exp. Design Ans. Which of the following is not a major principle of experimental design? e.) all of these are important principles The four principles of design are control, randomization, replication, and blocking

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Exp Design Ans. In order to assess the effects of diet on reducing cholesterol, a researcher randomly assigned 50 people to diet A and fifty people to diet B. They all reported to a clinic to have their cholesterol measured. The subjects were unaware of which diet they were using, and the technician measuring the cholesterol was not aware of which diet the participants had used. This is a(n) c.) double blind experiment A treatment was applied (the two diets)—and neither the subjects nor the technician knew which diet (group) the subjects were in.

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Exp. Design Ans. An experiment was conducted by some students to explore the nature of the relationship between a person's heart rate (measured in beats per minute) and the frequency at which that person stepped up and down on steps of various heights. Three rates of stepping and two different step heights were used. A subject performed the activity (stepping at one of the three stepping rates at one of the two possible heights) for three minutes. Heart rate was then measured at the end of this period. The variables "stepping rate" and "step height" are the a.) factors The variables “stepping rate” and “step height” are factors. “Stepping rate” has 3 levels and “step height” has 2 levels. This means that there are 6 possible treatments.

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Exp. Desigh Ans. A study to see the effects of caffeine on college student was conducted. Students in 2 class times were part of the study. Suppose half of the 8:30 students are randomly allocated to the treatment group (two cups of coffee), the other half to the control group (two cups of decaf). In addition, half of the 9:30 students are randomly allocated to the treatment group, the other half to the control group. This is an example of a E)block design. Students are “blocked” by time of class (a variable that may affect the response variable) and then randomly assigned to the treatment or control group

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Credits Questions have come from the Test Bank for Basic Practice of Statistics And Essentials of Statistics

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