You have just completed an experiment in which different subjects were randomly assigned to an experimental and a control group. Your dependent variable was the number of errors made on a memory test. The most appropriate parametric statistic for your data is the:
A) t test for independent samples.
B) t test for correlated samples.
C) z test for proportions.
D) All of the answers are correct.

Question

Quizplus · Accepted Answer

The t test for independent samples is appropriate because the subjects were randomly assigned to two different groups (experimental and control), and you are comparing the means of the two groups on a continuous dependent variable (number of errors on a memory test).

You Have Just Completed an Experiment in Which Different Subjects