In the Tukey Test, If $\overline { \mathrm { X } } _ { 2 } = 6$

Multiple Choice

In the Tukey test, if $\overline { \mathrm { X } } _ { 2 } = 6$ for a group of size $\mathrm { n } _ { 2 } = 7 , \quad \overline { \mathrm { X } } _ { 4 } = 14$ for a group of size $\mathrm { n } _ { 4 } = 7$ , and the within-group variance $s _ { w } ^ { 2 } = 28$ , then the $q$ test value for comparing group 2 to group 4 is:

A) -0.01
B) -0.29
C) -1.51
D) -4.00