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Direct Method of Finding Mean

Find the arit...

Question

Find the arithmetic mean of the children's height using direct method.

A

9.394

cm

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B

9.925

cm

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C

7.925

cm

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D

6.925

cm

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Solution

The correct option is A $9.394$ cm
Arithmetic mean using direct method formula is $¯ x = \frac{\sum f_{i} x_{i}}{\sum f_{i}}$
$¯ x = \frac{1785}{190}$
$¯ x = 9.3947$
The average mean height of the children is $9.39$ cm.

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