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.

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Harkirat Singh · Accepted Answer

Final Answer : D, Explanation :  To determine whether there is a significant difference between the mean response times of males and females in the study, Helen must calculate an inferential statistic, such as a t-test or ANOVA. This will allow her to determine whether the difference in means is statistically significant or simply due to chance. Options A and B are not relevant as they do not address the question of whether there is a significant difference between groups. Option C may be useful in increasing the power of the study, but it is not necessary for making a determination about the existence of a significant difference between groups.

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