A researcher is interested in the effect of playing puzzle games on academic achievement. He devised a scale that measures how often an individual plays puzzle games such as Sudoku, and uses student GPA has a measure of academic achievement. He finds that the correlation between the two variables is .40 and has a regression coefficient of .25. What is the percentage of variation in academic achievement accounted for by playing puzzle games?
a. 40%
b. 25%
c. 16%
d. 25%
Ans: c. 16%
Social Work & Human Services
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Answer the following statement(s) true (T) or false (F)
The prevalence of asthma varies by race and ethnicity.
Social Work & Human Services
Child welfare services that are financed by taxation are:
a. public b. faith-based c. proprietary d. mainly prevention-oriented.
Social Work & Human Services
Which of the following is the most expensive way of conducting a survey?
a. by mail b. on?line c. face?to?face d. by telephone
Social Work & Human Services
Researchers create a barrier to evidence-based policies when:
a. They disagree with each other. b. They are unable to communicate their findings. c. They attribute specific outcomes to a policy. d. All of the above choices.
Social Work & Human Services