A researcher is interested in doing a study comparing the effectiveness of two different approaches to teaching spelling. One approach is phonics-based, and the other is not. She randomly assigns 30 first grade children to the phonics-based approach and 30 children to the other approach. Her dependent variable is the number of words the children spell correctly on a 100-word spelling test. In order to compare the groups, what inferential test should she use?
A) Chi-square test for contingency tables
B) Partial correlation coefficient
C) t test for independent groups
D) Post hoc analysis of variance

Question

Quizplus · Accepted Answer

The t test for independent groups is appropriate here because the researcher is comparing the means of two independent groups (phonics-based vs. non-phonics-based) on a continuous dependent variable (number of words spelled correctly).

A Researcher Is Interested in Doing a Study Comparing the Effectiveness