he file Utility contains the electricity costs, in dollars,during July of a recent year for a random sample of 50 one-bedroomapartments in a large city: SELF TEST 96 171 202 157 185 90 141 149206 95 163 150 108 119 183 178 147 116 172 175 123 154 130 151 114102 153 111 148 128 144 143 187 135 191 197 127 82 213 130 165 168109 167 166 139 149 137 129 158 Decide whether the data appear tobe approximately normally distributed by a. comparing datacharacteristics to theoretical properties. b. constructing a normalprobability plot.
