After Conducting an Experiment,the Means for the Two Groups Are

Multiple Choice

After conducting an experiment,the means for the two groups are not identical which may suggest a difference between the two groups.However,in order to be sure,you need to analyze the experimental results in terms of the likelihood that the result simply occurred by chance.This is called

A) statistical significance.
B) practical significance.
C) descriptive statistics.
D) meta-analysis.