In the formula $M = l + \frac{(\frac{n}{2} - cf)}{f} \times c$ for the median,$cf = \ldots \ldots \ldots$

  • A
    cumulative frequency of the class preceding the median class
  • B
    lower limit of the median class
  • C
    frequency of the median class
  • D
    class length

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Similar Questions

Find 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 $2$ $6$ $8$ $16$ $20$ $18$ $16$ $14$

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The following is the distribution of weights (in $kg$) of $40$ persons:
Weight (in $kg$) $40-45$ $45-50$ $50-55$ $55-60$ $60-65$ $65-70$ $70-75$ $75-80$
Number of persons $4$ $4$ $13$ $5$ $6$ $5$ $2$ $1$

Construct a cumulative frequency distribution (of the less than type) table for the data above.

The median of an ungrouped data and the median calculated when the same data is grouped are always the same. Do you think that this is a correct statement? Give reason.

In the formula $M = l + \frac{(\frac{n}{2} - cf)}{f} \times h$ for the median,$n = \ldots \ldots \ldots$

Find the median of the following frequency distribution:
Class $65-85$ $85-105$ $105-125$ $125-145$ $145-165$ $165-185$ $185-205$
Frequency $4$ $5$ $13$ $20$ $14$ $8$ $4$

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