Researchers reject the null hypothesis when
A)statistical analyses showed that the p-value is large.
B)the difference between condition means is larger than would be expected on the basis of error variance alone.
C)the effect size is smaller than .05.
D)they want to avoid a Type I error.

Question

Quizplus · Accepted Answer

Researchers reject the null hypothesis when the observed data show a statistically significant difference, which is often indicated by the difference between condition means being larger than what would be expected by chance (error variance) alone. This is typically assessed through statistical tests that yield a p-value; if the p-value is small enough (usually < .05), it suggests that the observed data are unlikely under the null hypothesis, leading to its rejection. Options A, C, and D do not accurately describe conditions for rejecting the null hypothesis.

Researchers Reject the Null Hypothesis When