In her study examining the difference between females and males and the amount they smile, Pamela calculated a p-value of .005. Which of the following is a TRUE statement based on this finding?
A)The null hypothesis was correct.
B)There is a difference between females and males and the amount they smile.
C)The confidence level is 90%.
D)There is not enough power to determine if a difference exists.

Question

Quizplus · Accepted Answer

A p-value of .005 indicates that there is a statistically significant difference between females and males in the amount they smile, assuming the conventional alpha level of 0.05 for significance. This means that the probability of observing such a difference (or more extreme) by chance, if there were no true difference in the population, is very low (0.5%).

In Her Study Examining the Difference Between Females and Males