Helen Conducted a Study in Which She Measured the Response

Multiple Choice

Helen conducted a study in which she measured the response time for males and females to complete a spatial task.She found that the mean response time was 1.48 minutes for males and 1.63 minutes for females.For Helen to be confident that an actual difference exists between the males and females in her study,she must

A) calculate a correlation coefficient.
B) redo the experiment.
C) obtain a larger sample.
D) calculate an inferential statistic.