Descriptive Statisticshard
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A frequency distribution for employee ages (in years) uses class intervals:
| Age (years) | 20–30 | 30–40 | 40–50 | 50–60 |
|---|---|---|---|---|
| Frequency | 8 | 18 | 15 | 9 |
Using class midpoints, which is the mean age?
A frequency distribution for employee ages (in years) uses class intervals:
| Age (years) | 20–30 | 30–40 | 40–50 | 50–60 | |---|---|---|---|---| | Frequency | 8 | 18 | 15 | 9 |
Using class midpoints, which is the mean age?