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| वर्ग अंतराल | $0$-$10$ | $10$-$20$ | $20$-$30$ | $30$-$40$ | $40$-$50$ | $50$-$60$ | $60$-$70$ |
|---|---|---|---|---|---|---|---|
| बारंबारता | $4$ | $6$ | $16$ | $28$ | $16$ | $6$ | $4$ |
| $x_i$ | $5$ | $10$ | $15$ | $20$ | $25$ |
| $f_i$ | $7$ | $4$ | $6$ | $3$ | $5$ |
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