The results of an experimental study were statistically significant (p

Question

The results of an experimental study were statistically significant (p<.01).The researcher rejected the null hypothesis and accepted the alternative.In reality, there was no difference between the groups.The researcher
A) made a Type I error.
B) made a Type II error.
C) made a correct decision .
D) rejected a false null hypothesis.

Quizplus · Accepted Answer

The researcher made a Type I error, which means they rejected the null hypothesis (no difference between groups) when it was actually true. A Type I error occurs when the significance level (alpha) is set too high, leading to a higher probability of rejecting the null hypothesis when it is actually true.

The Results of an Experimental Study Were Statistically Significant (P