The data set below contains the electricity​ costs, in​ dollars,during July 2013 for a random sample of
30 ​one-bedroom apartments in a large city. Complete parts​ (a)and​ (b).
| 136 |
| 91 |
| 199 |
| 184 |
| 114 |
| 196 |
| 124 |
| 132 |
| 146 |
| 140 |
| 138 |
| 168 |
| 141 |
| 155 |
| 193 |
| 159 |
| 86 |
| 175 |
| 181 |
| 148 |
| 210 |
| 155 |
| 98 |
| 163 |
| 222 |
| 149 |
| 111 |
| 162 |
| 170 |
| 116 |
a. Decide whether the data appear to be approximately normallydistributed by comparing data characteristics to theoreticalproperties.
A.​No, the mean and median of the data are too different for thedistribution to be normal.
B.No, the range of the data is too great for the distribution tobe normal.
C.Yes, the distribution of the data appears to closely resemblea normal distribution.
D.No, the interquartile range of the data is too small for thedistribution to be normal
B) Decide whether the data appear to be approximately normallydistributed by constructing a normal probability plot.
