A research article reports results of a study using a t test for dependent means as "t(38)= 3.11, p

Question

A research article reports results of a study using a t test for dependent means as "t(38)= 3.11, p < .01." This tells you:
A)the result is statistically significant
B)the result is not statistically significant
C)you can assume a one-tailed test was used
D)there were 39 degrees of freedom

Quizplus · Accepted Answer

The t value of 3.11 indicates that the means of the two related groups being compared are significantly different from each other. The p-value of less than .01 indicates that the probability of obtaining such a result by chance alone is less than 1%, which is statistically significant. We cannot determine from this information whether a one-tailed or two-tailed test was used, and the degrees of freedom are calculated as n-1, which would be 38 in this case.

A Research Article Reports Results of a Study Using a T