The mass of a whiffle ball varies, usually between 40 and 50 grams. You decide to gather a random sample of whiffle balls and record the mass of each. Your data is displayed in the table below. (Units are grams.)
| 42.9 | 48.5 | 44.1 | 44.9 | 49.1 | 42.2 | 47 | 46.7 | 45.2 |
You would like to describe the variability in whiffle ball mass from your sample. You decide to make several calculations describing the "spread" of the data set.
Find the following:
- range
- IQR
- sample standard deviation
- interpret the standard deviation: