The following data involving regression of delinquency index (DI) (Y) on IQ (X). The sample of 22 observations consists of males only. Another sample of observations has been obtained for 14 females. The information needed to compare the straight-line regression equations for males and females is given in the following table. Sex Group Males n 1 X Y S SX r 22 71 -0.44 102 26 216 24 -0.81 Females 14 62 -0.43 101 17 175 17 -0.83 If we want to test Ho: the slopes are the same for males and females, what is the value of SBM-BF)? 0.073 0.73 0.14 0.014