Question
Index numbers are 'economic barometers'. Explain this statement.
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| School | Mean Income (in ₹) | Standard Deviation (in ₹) |
| A | 800 | 120 |
| B | 900 | 135 |
| Units Sold | Total Revenue (₹) | Average Revenue (₹) | Marginal Revenue (₹) |
| 1 | 10 | ||
| 2 | 24 | ||
| 3 | 33 | ||
| 4 | 40 | ||
| 5 | 40 | ||
| 6 | 36 | ||
| 7 | 28 |