A Researcher Is Comparing Three Groups of the Same Size

Multiple Choice

A researcher is comparing three groups of the same size. The sample mean of the first group is 11, the sample mean of the second group is 13, and the sample mean of the third group is 15. If the Tukey q-test
Value for comparing group 1 with group 2 is -2.1, then the Tukey q-test value for comparing group 1 with
Group 3 will be:

A) -2.1
B) -4.2
C) -8.4
D) Cannot be determined with the information given