Question

QUESTION 2 The following data were obtained from a repeated-measures research study. What is the value for MD? Post Pre SubjectA 10 8 SubjectB 12 6 SubjectC 7 10 SubjectD 11 9 SubjectE 10 7 O sample mean difference (MD) is 1.000 O sample mean difference (MD) is 2.000 O sample mean difference (MD) is 2.500 O sample mean difference (MD) is 8.000

Answer 1

We want to find, the sample mean difference ( M_D ),

$M_D = \frac { | (8-10) + (6-12)+(10-7)+(9-11)+(7-10)| }{5}$

$M_D = \frac { | (-2) + (-6)+(3)+(-2)+(-3)| }{5}$

$M_D = \frac { | -10| }{5}$

$M_D = \frac { 10 }{5}$

$M_D = 2$

Therefore, the sample mean difference (M_D) is 2.000