Question


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| Details | Mean | Median | First quartile | Third quartile | Standard deviation |
| Firm $A$ | $350$ | $344$ | $324$ | $356$ | $26$ |
| Firm $B$ | $360$ | $340$ | $330$ | $370$ | $38$ |
| No. of units | Below $200$ | $200 – 300$ | $300 – 400$ | $400 – 500$ | $500$ and above |
| No. of families | $7$ | $13$ | $24$ | $16$ | $10$ |