A research article reports the following for an independent t test: = .05, t (6) = −4.40, p .005, d = −3.11. Which of the following reflects the interpretation for the hypothesis test?
A) Fail to reject the null hypothesis
B) Reject the null hypothesis
C) There is a small effect
D) There is a large effect

Question

Quizplus · Accepted Answer

The p-value of .005 is less than the alpha level of .05, indicating that we can reject the null hypothesis. The t-value of -4.40 is statistically significant and the effect size, as indicated by Cohen's d of -3.11 is very large. Therefore, we reject the null hypothesis and there is a large effect.

A Research Article Reports the Following for an Independent T