A Study Was Conducted to Investigate the Effect of an Intervention

Multiple Choice

A study was conducted to investigate the effect of an intervention protocol on IQ tests.Nine randomly selected students were tested. $$\begin{array} { l c } \text { Before } & \text { After } \\100 & 106 \\111 & 112 \\93 & 95 \\92 & 90 \\99 & 107 \\85 & 100 \\117 & 126 \\110 & 105 \\98 & 110\end{array}$$
Calculate T^- and T⁺

A) 44,1
B) 38.5,6.5
C) 45.5,2.5
D) 32.5,12.5