Will rate helfpul if answered correctly :)) thanks tutor~!

19. William Tindall (A-34) performed a retrospective study of the records of patients receiving care for hypercholesterolemia. The following table gives measurements of total cholesterol for patients before and 6 weeks after taking a statin drug. Is there sufficient evidence at the a = .01 level of significance for us to conclude that the drug would result in reduction in total cholesterol in a population of similar hypercholesterolemia patients?Id. No. Before After Id. No. Before After Id. No. Before After 195 125 37 221 191 73 205 151 208 164 38 245 164 74 298 163 254 152 39 250 162 75 305 171 226 144 40 266 180 76 262 129 290 212 41 240 161 77 320 191 239 171 42 218 168 78 271 167 216 164 43 278 200 79 195 158 286 200 44 185 139 80 345 192 243 190 45 280 207 81 223 117 10 217 130 46 278 200 82 220 114 11 245 170 47 223 134 83 279 181 12 257 182 48 205 133 84 252 167 13 199 153 49 285 161 85 246 158 14 277 204 50 314 203 86 304 190 15 249 174 51 235 152 87 292 177 16 197 160 52 248 198 88 276 148 17 279 205 53 291 193 89 250 169 18 226 159 54 231 158 90 236 185 19 262 170 55 208 148 91 256 172 20 231 180 56 263 203 92 269 188 21 234 161 57 205 156 93 235 172 22 170 139 58 230 161 94 184 151 23 242 159 59 250 150 95 253 156 24 186 114 60 209 181 96 352 219 25 223 134 61 269 186 97 266 186 26 220 166 62 261 164 98 321 206 27 277 170 63 255 164 99 233 173 28 235 136 64 275 195 100 224 109 29 216 134 65 239 169 101 274 109 30 197 138 66 298 177 102 222 136 31 253 181 67 265 217 103 194 131 32 209 147 68 220 191 104 293 228 33 245 164 69 196 129 105 262 211 34 217 159 70 177 142 106 306 192 35 187 139 71 211 138 107 239 174 36 265 171 72 244 166 Source: Data provided courtesy of William Tindall, Ph.D. and the Wright State University Consulting Center