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Quiz

Chapter 6

sarah wood 10 perguntas

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Perguntas do quiz (10)

  1. 1A study was conducted to test the effectiveness of using an antidepressant called imipramine in treating bulimia, an eating disorder. Twenty patients were randomly assigned to one of two groups with ten in each. One group received imipramine and the other received a placebo. The response measured was binge frequency. What type of study is this?
    1. AObservational Study
    2. BRandomized Controlled Experiment
    3. CMatched Pairs Experiment
    4. DRandomized Block Experiment
  2. 2Gas mileage was compared for Premium and Regular gas for twenty Toyota Prius’s. Each car was run on a tank of Premium gas and on a tank of Regular gas. Before the study, a coin was tossed for each car. If the coin was heads, the car was first tested with Premium gas; if the coin was tails, the car was first tested with Regular gas. At the end of the study, average miles per gallon for the two types of gas was compared. What type of study is this?
    1. AObservational Study
    2. BRandomized Controlled Experiment
    3. CMatched Pairs Experiment
    4. DRandomized Block Experiment
  3. 3A randomized block design should be used when the subjects within groups (called blocks) are similar in ways that affect the response variable, but different from one block to the next.
    1. AVerdadeiro
    2. BFalso
  4. 4Which one of the following is a benefit of randomized block designs (RBD)?
    1. ARBD eliminates all lurking variables.
    2. BRBD reduces chance variation by removing variation associated with the blocking variable.
    3. CRBD removes bias.
    4. DRBD eliminates the placebo effect.
  5. 5In 2015, a BYU professor investigated the impact that social isolation has on early mortality. This professor discovered that individuals that experienced social isolation had a higher likelihood of mortality than individuals that did not experience social isolation. (Source: Holt-Lunstad, Julianne et al, “Loneliness and Social Isolation as Risk Factors for Mortality: A Meta-Analytic Review”, Association for Psychological Science, April 2015.)

    What is the explanatory variable in this scenario?
    1. AThe likelihood of mortality experienced by individuals
    2. BWhether an individual felt lonely
    3. CWhether an individual experienced social isolation
    4. DThe gender of an individual
  6. 6In 2015, a BYU professor investigated the impact that social isolation has on early mortality. This professor discovered that individuals that experienced social isolation had a higher likelihood of mortality than individuals that did not experience social isolation. (Source: Holt-Lunstad, Julianne et al, “Loneliness and Social Isolation as Risk Factors for Mortality: A Meta-Analytic Review”, Association for Psychological Science, April 2015.)

    What is the response variable in this scenario?
    1. AWhether an individual felt lonely
    2. BHow long an individual lived
    3. CWhether an individual experienced social isolation
    4. DThe likelihood of mortality experienced by individuals
  7. 7Researchers want to compare the effectiveness of exercise and dieting compared to dieting alone for weight loss. They have 60 volunteers, 30 men and 30 women. They randomly assign half of the men to Group 1, exercise and diet, and the other half to Group 2, diet alone. They follow the same procedure for the women. Half of the women are assigned to Group 1 and the other half are assigned to Group 2. After 16 weeks, their weight loss was measured and compared. What type of study is this?
    1. AObservational Study
    2. BRandomized Controlled Experiment
    3. CMatched Pairs Experiment
    4. DRandomized Block Experiment
  8. 8Researchers want to determine if there is a link between whether an individual uses illegal drugs and whether they graduated from high school. They randomly survey 300 people and asked them following questions:
    "Did you graduate from high school?"
    "Have you ever used illegal drugs?"

    What type of study is this?
    1. AObservational Study
    2. BRandomized Controlled Experiment
    3. CMatched Pairs Experiment
    4. DRandomized Block Experiment
  9. 9Researchers want to determine if there is a link between whether an individual uses illegal drugs and whether they graduated from high school. They randomly survey 300 people and asked them following questions:
    "Did you graduate from high school?"
    "Have you ever used illegal drugs?"

    Why might the results from the study above be biased?
    1. AThey didn't sample enough people.
    2. Bpeople may not want to admit they have used illegals drugs, resulting in response bias.
    3. CThey didn't randomly select participants.
  10. 10Consider the following two survey questions:

    Question 1: How often do you read a book for fun (outside of work or school)?

    Question 2: How often do you read a book for fun (outside of work or school): never, sometimes, or often?

    Are these examples of open or closed questions?
    1. AQuestion 1 is an open question and Question 2 is a closed question.
    2. BQuestion 1 is a closed question and Question 2 is an open question.
    3. CBoth are examples of closed questions.
    4. DBoth are examples of open questions.

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Statistics Quiz sobre Chapter 6, criado por sarah wood em 24-01-2019.
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