1.68 Smolts. Smolts are young salmon at a stage when their skin becomes covered with silvery scales and they start to migrate from freshwater to the sea. The reflectance of a light shined on a smolt’s skin is a measure of the smolt’s readiness for the migration. Here are the reflectances, in percents, for a sample of 50 smolts:25
| 57.6 | 54.8 | 63.4 | 57.0 | 54.7 | 42.3 | 63.6 | 55.5 | 33.5 | 63.3 |
| 58.3 | 42.1 | 56.1 | 47.8 | 56.1 | 55.9 | 38.8 | 49.7 | 42.3 | 45.6 |
| 69.0 | 50.4 | 53.0 | 38.3 | 60.4 | 49.3 | 42.8 | 44.5 | 46.4 | 44.3 |
| 58.9 | 42.1 | 47.6 | 47.9 | 69.2 | 46.6 | 68.1 | 42.8 | 45.6 | 47.3 |
| 59.6 | 37.8 | 53.9 | 43.2 | 51.4 | 64.5 | 43.8 | 42.7 | 50.9 | 43.8 |
(a) Find the mean reflectance for these smolts.
(b) Find the median reflectance for these smolts.
(c) Do you prefer the mean or the median as a measure of center for these data? Give reasons for your preference.