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**Statistics for the Behavioral Sciences The Paired-Samples t Test**

Susan A. Nolan and Thomas E. Heinzen Statistics for the Behavioral Sciences Second Edition Chapter 10: The Paired-Samples t Test iClicker Questions Copyright © 2012 by Worth Publishers

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Chapter 10 It is hypothesized that there will be a significant difference in aggression scores after caffeine consumption as compared to before caffeine consumption. This hypothesis best illustrates what type of t test? a) a single-sample t test b) a nonparametric t test c) an independent samples t test d) a paired-samples t test

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Chapter 10 (Answer) It is hypothesized that there will be a significant difference in aggression scores after caffeine consumption as compared to before caffeine consumption. This hypothesis best illustrates what type of t test? a) a single-sample t test b) a nonparametric t test c) an independent samples t test d) a paired-samples t test

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**Chapter 10 A paired-samples t test is also known as a(n):**

a) single sample t test. b) independent samples t test. c) dependent samples t test. d) confidence interval.

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**Chapter 10 (Answer) A paired-samples t test is also known as a(n):**

a) single sample t test. b) independent samples t test. c) dependent samples t test. d) confidence interval.

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Chapter 10 3. In a paired-samples t test, each participant provides ____ score(s), one for each condition. a) 1 b) 2 c) 3 d) 4

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Chapter 10 (Answer) 3. In a paired-samples t test, each participant provides ____ score(s), one for each condition. a) 1 b) 2 c) 3 d) 4

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Chapter 10 4. Your textbook identifies six steps in calculating a paired-samples t test. Listed below are the first three of these steps. Which one does not belong? a) Randomly assign participants to different conditions. b) Identify the populations, distribution, and assumptions. c) State the null and research hypotheses. d) Determine the characteristics of the comparison distribution.

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Chapter 10 (Answer) 4. Your textbook identifies six steps in calculating a paired-samples t test. Listed below are the first three of these steps. Which one does not belong? a) Randomly assign participants to different conditions. b) Identify the populations, distribution, and assumptions. c) State the null and research hypotheses. d) Determine the characteristics of the comparison distribution.

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Chapter 10 5. Your textbook identifies six steps in calculating a paired-samples t test. Listed below are the last three of these steps. Which one does not belong? a) Determine the critical values, or cutoffs. b) Calculate the test statistic. c) Make a decision d) Identify the variable causing the change.

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Chapter 10 (Answer) 5. Your textbook identifies six steps in calculating a paired-samples t test. Listed below are the last three of these steps. Which one does not belong? a) Determine the critical values, or cutoffs. b) Calculate the test statistic. c) Make a decision d) Identify the variable causing the change.

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Chapter 10 (Answer) 6. When determining cutoffs for a paired-samples t test, we typically determine critical values in terms of: a) raw scores. b) t statistics. c) z scores. d) degrees of freedom.

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Chapter 10 (Answer) 6. When determining cutoffs for a paired-samples t test, we typically determine critical values in terms of: a) raw scores. b) t statistics. c) z scores. d) degrees of freedom.

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Chapter 10 7. Your textbook lists five steps in calculating a confidence interval for a paired-samples t test. Which of the following is not one of those steps? a) Draw a picture of a t distribution that includes the confidence interval. b) Indicate the bounds of the confidence interval on the drawing. c) Add the critical t statistics to the curve. d) Start over and calculate z scores instead.

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Chapter 10 (Answer) 7. Your textbook lists five steps in calculating a confidence interval for a paired-samples t test. Which of the following is not one of those steps? a) Draw a picture of a t distribution that includes the confidence interval. b) Indicate the bounds of the confidence interval on the drawing. c) Add the critical t statistics to the curve. d) Start over and calculate z scores instead.

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Chapter 10 8. To calculate effect size for a paired-samples t test we use: a) hypothesis testing. b) the p statistic. c) Cohen’s d. d) the z statistic.

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Chapter 10 (Answer) 8. To calculate effect size for a paired-samples t test we use: a) hypothesis testing. b) the p statistic. c) Cohen’s d. d) the z statistic.

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Chapter 10 The fact that a research participant encounters the dependent variable twice in a within-groups design means that we have to be concerned about: a) order effects. b) using statistics. c) compensating participants. d) gender differences.

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Chapter 10 (Answer) The fact that a research participant encounters the dependent variable twice in a within-groups design means that we have to be concerned about a) order effects. b) using statistics. c) compensating participants. d) gender differences.

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**Chapter 10 10. Counterbalancing minimizes order effects by:**

a) randomly assigning participants to conditions. b) varying the order of presentation of different levels of the independent variable from one participant to the next. c) including a lot more research participants in the study. d) converting the within subjects design into a between subjects design.

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**Chapter 10 (Answer) 10. Counterbalancing minimizes order effects by:**

a) randomly assigning participants to conditions. b) varying the order of presentation of different levels of the independent variable from one participant to the next. c) including a lot more research participants in the study. d) converting the within subjects design into a between subjects design.

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