A researcher determines that children whose parents read to them for more than one hour each day have better grades than do children whose parents read to them for only a few minutes per day. What can you conclude from this pattern of data?
A. Parental reading causes children to do better in school.
B. Parental reading time and grades are positively correlated.
C. Parental reading time and grades are unrelated.
D. Good students cause their parents to spend more time reading to them.
B. Parental reading time and grades are positively correlated.
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Examine the following scatterplot. How would you describe its appearance?
A. Positive relationship B. Negative relationship C. No relationship D. Inverse relationship
Answer the following statement(s) true (T) or false (F)
Researchers must place limits or constraints on the observations made in a naturalistic design
If there is no difference between the distributions of scores in two groups, your effect size will be equal to _______.
a. 0 b. 1 c. 5 d. 20
Which of the following sources of error variance is not accounted for in a coefficient of stability and equivalence?
a. Content sampling b. Procedures in administering or scoring the test c. Ability differences among the subjects d. Time between the equivalent forms e. Changes in the examinees' emotional state