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(D) To find the median class and modal class,we first prepare the cumulative frequency table:						Class			Frequency $(f)$			Cumulative Frequency $(cf

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$25$

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(D) To find the median class and modal class,we first prepare the cumulative frequency table:						Class			Frequency $(f)$			Cumulative Frequency $(cf)$							$0-5$			$10$			$10$							$5-10$			$15$			$25$							$10-15$			$12$			$37$							$15-20$			$20$			$57$							$20-25$			$9$			$66$			$1$. Total frequency $N = 66$. So,$\frac{N}{2} = \frac{66}{2} = 33$.$2$. The cumulative frequency just greater than $33$ is $37$,which corresponds to the class interval $10-15$. Thus,the median class is $10-15$,and its lower limit is $10$.$3$. The highest frequency is $20$,which corresponds to the class interval $15-20$. Thus,the modal class is $15-20$,and its lower limit is $15$.$4$. The sum of the lower limits is $10 + 15 = 25$.

Class	$0-10$	$10-20$	$20-30$	$30-40$	$40-50$	$50-60$
Frequency	$7$	$12$	$x$	$28$	$y$	$9$

Class	$1-3$	$3-5$	$5-7$	$7-9$	$9-11$
Frequency	$6$	$3$	$8$	$2$	$1$

Class	$0-5$	$6-11$	$12-17$	$18-23$	$24-29$
Frequency	$13$	$10$	$15$	$8$	$11$

For the following distribution:

Class $0-5$ $5-10$ $10-15$ $15-20$ $20-25$

Frequency $10$ $15$ $12$ $20$ $9$

the sum of the lower limits of the median class and the modal class is:

Similar Questions

The mode of the following data is $33 \frac{1}{3}$ and the total frequency is $100$. Find the missing frequencies $x$ and $y$.

Class $0-10$ $10-20$ $20-30$ $30-40$ $40-50$ $50-60$

Frequency $7$ $12$ $x$ $28$ $y$ $9$

For the calculation of mode of the following frequency distribution,$f_{0} = \dots \dots \dots \dots \dots$

Class $1-3$ $3-5$ $5-7$ $7-9$ $9-11$

Frequency $6$ $3$ $8$ $2$ $1$

Consider 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

The mean of $10$ observations is $15.7$. If a new observation $19$ is included,the new mean is ..........

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

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Class	$0-5$	$5-10$	$10-15$	$15-20$	$20-25$
Frequency	$10$	$15$	$12$	$20$	$9$

For the following distribution: Class $0-5$ $5-10$ $10-15$ $15-20$ $20-25$ Frequency $10$ $15$ $12$ $20$ $9$ the sum of the lower limits of the median class and the modal class is: