The association between large family size and lower intelligence scores can be entirely explained by ________.
A. the ability of parents of fewer children to provide more stimulation
B. the effects of wider spacing of births
C. the effects of birth order
D. a strong trend for low-SES mothers to give birth to more children
Answer: D
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The marginal means is the means for each level of an independent variable in a ______.
A. interaction effect B. levels of the independent variable C. marginal means D. factorial design
A _____________ draws a range a little higher and lower than the sample mean to help depict where the true mean probably lies
a. confidence interval b. standard deviation c. significance test d. descriptive statistic
The ______ correction reduces the degrees of freedom to 1 and n – 1.
a. Huynh-Feldt b. lower-bound c. Greenhouse-Geisser d. orthogonal
In which of the following ways does restricting the range of a variable affect the correlation coefficient?
A. It improves the correlation coefficient. B. It has no effect on the correlation coefficient. C. It reduces the magnitude of the correlation coefficient. D. It changes the direction of the correlation coefficient.