While computing the mean of grouped data,we assume that the frequencies are
- Aevenly distributed over all the classes
- Bcentred at the lower limits of the classes
- Ccentred at the upper limits of the classes
- Dcentred at the classmarks of the classes
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Similar Questions
In the formula $\bar{x} = A + \frac{\Sigma f_{i} u_{i}}{\Sigma f_{i}} \times c$,$c$ represents .......
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View SolutionFor a given frequency distribution,$\Sigma f_{i} x_{i} = 1790$ and $\Sigma f_{i} = 50$. Then,the mean $\bar{x} = $ ..........
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View SolutionDaily wages of $110$ workers,obtained in a survey,are tabulated below:
Daily wages (in $Rs.$) Number of workers $100-120$ $10$ $120-140$ $15$ $140-160$ $20$ $160-180$ $22$ $180-200$ $18$ $200-220$ $12$ $220-240$ $13$
Compute the mean daily wages of these workers (in $Rs.$).
| Daily wages (in $Rs.$) | Number of workers |
| $100-120$ | $10$ |
| $120-140$ | $15$ |
| $140-160$ | $20$ |
| $160-180$ | $22$ |
| $180-200$ | $18$ |
| $200-220$ | $12$ |
| $220-240$ | $13$ |
Compute the mean daily wages of these workers (in $Rs.$).
Difficult
View SolutionMidpoint (Midvalue) of the class $15-30$ is ........
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View SolutionIn the formula $Z = l + \left( \frac{f_{1} - f_{0}}{2f_{1} - f_{0} - f_{2}} \right) \times c$ for the mode,$c = \dots$
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