Before147 153 132 141 157 148 137 140 145 146151 159 134After155 167 132 139 166 161 146 163 159 143161 158 1471. The GRE Verbal scores for a sample of students before and after taking an test-taking class are given below.a. Use Sign Test, with .05 significance, to test the claim that the test-taking class has an effect on the GRE Verbal score.b. Use the Wilcoxon Signed-Ranks test with .05 significance, to test the claim that the test-taking class has an effect on the GRE Verbal score.2. The GRE Verbal scores for a sample of students from three colleges are listed below. Use your calculator, and .05 significance to test the claim that the mean GRE Verbal score for students at the three schools is the same.School 1School 2School 31521631311391441381441641301611581371531341521561541551591501
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