Before 147 153 132 141 157 148 137 140 14

Before
147 153 132 141 157 148 137 140 145 146151 159 134
After
155 167 132 139 166 161 146 163 159 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 1
School 2
School 3
152
163
131
139
144
138
144
164
130
161
158
137
153
134
152
156
154
155
159
150
1
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