Chapter 6 Multiple choice questions

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. What is the effect size (d) for a t-test with t=4.41, with 24 participants in each of the two groups?

d = 1.59 correct incorrect

d = 0.53 correct incorrect

d = 1.27 correct incorrect

d = 1.34 correct incorrect

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. What is the effect size (d) for a correlation of 0.4 with 60 subjects?

d = 4.39 correct incorrect

d = 0.87 correct incorrect

d = 80.86 correct incorrect

d = 7.96 correct incorrect

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. What is the effect size (g) for an F-test with F=3.3, and 18 and 12 subjects in the two groups?

g = 0.53 correct incorrect

g = 0.66 correct incorrect

g = 0.26 correct incorrect

g = 0.68 correct incorrect

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. What is the odds ratio for a two-tailed t-test which produced a p-value of 0.032 having tested 15 subjects in each group?

OR = 4.46 correct incorrect

OR = 1.49 correct incorrect

OR = 0.82 correct incorrect

OR = 79% correct incorrect

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. Which of the following is the largest effect size (Cohen's d)?

d = 1 correct incorrect

A correlation with r = 0.54 and 20 participants correct incorrect

A t-test with t = 2.2 and 12 participants per group correct incorrect

A chi-square test with x² = 0.77 for 87 participants correct incorrect

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. Create two variables as follows, that contain lists of effect sizes (d) and accompanying standard errors:
d <- c(0.82,1.14,0.11,3.4)
se <- c(0.11,0.84,0.15,2.2)
Run a random effects meta-analysis using these variables. What is the mean d?

d = 0.11 correct incorrect

d = 0.94 correct incorrect

d = 0.32 correct incorrect

d = 0.61 correct incorrect

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. What is the standard error of the mean effect size from question 6?

SE = 0.32 correct incorrect

SE = 0.23 correct incorrect

SE = 0.61 correct incorrect

SE = 0.11 correct incorrect

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. Run the analysis from questions 6 and 7 again, but as a fixed effects analysis. What are the mean effect size and standard error?

d = 0.66, SE = 0.08 correct incorrect

d = 0.53, SE = 0.11 correct incorrect

d = 0.58, SE = 0.09 correct incorrect

d = 0.24, SE = 0.18 correct incorrect

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. Conduct a random effects meta analysis based on the following data:
d: 1.14, 2.38, 0.02, 0.64
SE: 0.12, 0.45, 0.01, 0.22
What is the mean effect size?

d = 0.54 correct incorrect

d = 0.96 correct incorrect

d = 1.02 correct incorrect

d = 0.71 correct incorrect

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. Repeat the analysis for question 9, but fixing the weights at 1. What is the standard error of the mean effect size?

SE = 0.41 correct incorrect

SE = 1.04 correct incorrect

SE = 0.58 correct incorrect

SE = 0.42 correct incorrect