$\begin{matrix} Class mark & 12.5 & 17.5 & 22.5 & 27.5 & 32.5 & 37.5 & 42.5 Frequency & 12 & 17 & 22 & 27 & 30 & 21 & 16 \end{matrix}$

(a) From the distribution, given above, construct a frequency table.

(b) Use the table obtained in part (a) to draw : (i) a histogram, (ii) an ogive.

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Solution

(a)

Difference in consecutive class marks = 17.5 − 12.5 = 5

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Similar questions

:

Daily wages (in Rs.)	$12.5 - 17.5$	$17.5 - 22.5$	$22.5 - 27.5$	$27.5 - 32.5$	$32.5 - 37.5$
Number of workers	$4$	$20$	$22$	$10$	$6$

\begin{matrix} C l a s s & 12.5 - 17.5 & 17.5 - 22.5 & 22.5 - 27.5 & 27.5 - 32.5 & 32.5 - 37.5 F r e q u e n c y & 2 & 22 & 19 & 14 & 13 \end{matrix}

\begin{matrix} C l a s s & 12.5 - 17.5 & 17.5 - 22.5 & 22.5 - 27.5 & 27.5 - 32.5 & 32.5 - 37.5 F r e q u e n c y & 2 & 22 & 19 & 14 & 13 \end{matrix}

(a) Use the information given in the adjoining histogram to construct a frequency table.

(b) Use this table to construct an ogive

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