An Investigator Conducts a Statistical Test to Determine Whether the Difference

Multiple Choice

An investigator conducts a statistical test to determine whether the difference between the experimental group and the control group was statistically significant. Other things being equal, the difference is most likely to be significant if

A) the standard deviation was high for each group.
B) the mean of one group was much larger than the mean of the other group.
C) both groups had a small number of participants.
D) the mean for each group was about the same size as the standard deviation.