Five mark example problems I — task. Mathematics State Board, Class 9.

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Find the mean of the following distribution using Step Deviation method.

Class Interval	$0 - 8$	$8 - 16$	$16 - 24$	$24 - 32$	$32 - 40$	$40 - 48$
Frequency ( $f$ )	$10$	$20$	$14$	$16$	$18$	$22$

Answer:

Mean

$=$

(Note: Round off the answer to

$2$ decimal places.)

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8. Five mark example problems I