8(ii) State the modal Class
Class Interval $50 - 55$ $55 - 60$ $60 - 65$ $65 - 70$ $70 - 75$ $75 - 80$ $80 - 85$ $85 - 90$
Frequency $5$ $20$ $10$ $10$ $9$ $6$ $12$ $8$

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Solution

Procedure to find the modal class:
Here, the highest frequency is $20$ and the class corresponding to this frequency is $55 - 60$ .
Hence, the modal class for the given data is $55 - 60$ .

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Similar questions

8.(i) Using step-deviation method, calculate the mean marks of the following distribution.

Class Interval	$50 - 55$	$55 - 60$	$60 - 65$	$65 - 70$	$70 - 75$	$75 - 80$	$80 - 85$	$85 - 90$
Frequency	$5$	$20$	$10$	$10$	$9$	$6$	$12$	$8$

The following table gives the weekly wages of the workers in a factor

Weekly Wages	$50 - 55$	$55 - 60$	$60 - 65$	$65 - 70$	$70 - 75$	$75 - 80$	$80 - 85$	$85 - 90$
No. of workers	$5$	$20$	$10$	$10$	$9$	$6$	$12$	$8$

Calculate

(ii)the modal class

Find the mean of the following using step deviation method.

The following table gives the weekly wages of workers in a factory

Weekly Wages	$50 - 55$	$55 - 60$	$60 - 65$	$65 - 70$	$70 - 75$	$75 - 80$	$80 - 85$	$85 - 90$
No. of workers	$5$	$20$	$10$	$10$	$9$	$6$	$12$	$8$

Calculate

(i) the mean

\begin{matrix} C l a s s i n t e r v a l & F r e q u e n c y 50 - 55 & 5 55 - 60 & 20 60 - 65 & 10 65 - 70 & 10 70 - 75 & 9 75 - 80 & 6 80 - 85 & 12 85 - 90 & 8 \end{matrix}

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