To compare two elementary schools regarding teaching of reading skills, 12 sets of identical twins were used. In each case, one child was selected at random and sent to school A, and his or her twin was sent to school B. Near the end of fifth grade, an achievement test was given to each child. The results follow: Twin Pair 2 3 5 6 School A 168 128 115 99 119 113 School B 123 142 110 110 120 122 Twin Pair 7 9 10 11 12 School A 120 121 132 145 138 117 School B 105 90 124 142 148 104 Suppose a sign test for matched pairs with a 10% level of significance is used to test the hypothesis that the schools have the same effectiveness in teaching reading skills against the alternate hypothesis that the schools have different levels of effectiveness in teaching reading skills. Let p denote portion of positive signs when the scores of school B are subtracted from the corresponding scores of school A. State the conclusion of the test and interpret your results with a 10% level of significance