A Researcher Reports That Mean Ratings of Liking for Some

Multiple Choice

A researcher reports that mean ratings of liking for some food are 0.8 ± 2.4 (M ± SD) .If the null hypothesis was that the mean equals 0,then what is the effect size for this test using estimated Cohen's d?

A) d = 0.33; small effect size
B) d = 0.33; medium effect size
C) d = 3.00; large effect size
D) There is not enough information to answer this question.