Data was collected for 300 fish from the North Atlantic. The length of the fish (in mm) is summarized in the GFDT below.
| Lengths (mm) | Frequency |
|---|---|
| 160 - 164 | 1 |
| 165 - 169 | 16 |
| 170 - 174 | 71 |
| 175 - 179 | 108 |
| 180 - 184 | 1 |
| 185 - 189 | 18 |
| 190 - 194 | 3 |
What is the lower class boundary for the first class?
class boundary =