In the formula $\bar{x} = a + \frac{\sum f_{i} d_{i}}{\sum f_{i}}$ for finding the mean of grouped data,$d_{i}$ are deviations from $a$ of:
- Alower limits of the classes
- Bupper limits of the classes
- Cmid points of the classes
- Dfrequencies of the class marks
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Similar Questions
If the mean of $12, 13, x, 17, 18$ and $20$ is $16,$ then $x = \ldots \ldots \ldots \ldots .$
Medium
View SolutionFind the median of the following frequency distribution:
Class $0-10$ $10-20$ $20-30$ $30-40$ $40-50$ $50-60$ $60-70$ $70-80$ Frequency $2$ $6$ $8$ $16$ $20$ $18$ $16$ $14$
| Class | $0-10$ | $10-20$ | $20-30$ | $30-40$ | $40-50$ | $50-60$ | $60-70$ | $70-80$ |
| Frequency | $2$ | $6$ | $8$ | $16$ | $20$ | $18$ | $16$ | $14$ |
Difficult
View SolutionThe modal class of a frequency distribution is $20-24$. Then,in the calculations of mode,$l=$ ..........
Easy
View SolutionIn the formula $M = l + \frac{(\frac{n}{2} - cf)}{f} \times h$ for the median,$n = \ldots \ldots \ldots$
Easy
View SolutionCalculate the mean of the following data:
Class $4-7$ $8-11$ $12-15$ $16-19$ Frequency $5$ $4$ $9$ $10$
| Class | $4-7$ | $8-11$ | $12-15$ | $16-19$ |
| Frequency | $5$ | $4$ | $9$ | $10$ |
Medium
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