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
Construct the cumulative frequency distribution of the following distribution:
Class $12.5-17.5$ $17.5-22.5$ $22.5-27.5$ $27.5-32.5$ $32.5-37.5$ Frequency $2$ $22$ $19$ $14$ $13$
| Class | $12.5-17.5$ | $17.5-22.5$ | $22.5-27.5$ | $27.5-32.5$ | $32.5-37.5$ |
| Frequency | $2$ | $22$ | $19$ | $14$ | $13$ |
Medium
View SolutionTo draw the 'less than' type Ogive,........... is represented on the $X$-axis.
Easy
View SolutionFind the median of the following frequency distribution:
Class $0-5$ $5-10$ $10-15$ $15-20$ $20-25$ $25-30$ $30-35$ Frequency $5$ $15$ $15$ $8$ $4$ $2$ $1$
| Class | $0-5$ | $5-10$ | $10-15$ | $15-20$ | $20-25$ | $25-30$ | $30-35$ |
|---|---|---|---|---|---|---|---|
| Frequency | $5$ | $15$ | $15$ | $8$ | $4$ | $2$ | $1$ |
Medium
View SolutionConsider the following frequency distribution:
Class $0-5$ $6-11$ $12-17$ $18-23$ $24-29$ Frequency $13$ $10$ $15$ $8$ $11$
The upper limit of the median class is
| Class | $0-5$ | $6-11$ | $12-17$ | $18-23$ | $24-29$ |
| Frequency | $13$ | $10$ | $15$ | $8$ | $11$ |
The upper limit of the median class is
Medium
View SolutionFor some given data,if $M + \bar{x} = 32$ and $M - \bar{x} = 2$,then $Z = \ldots \ldots \ldots$
Easy
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