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Calculate the range and coefficent of range from the following data:

written 6.4 years ago by teamques10 ★ 70k

•   modified 6.4 years ago

marks	10-19	20-29	30-39	40-49	50-59	60-69
No.of students	6	10	16	14	8	4

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written 6.4 years ago by teamques10 ★ 70k

Solution:

C.I	9.5-19.5	19.5-29.5	29.5-39.5	39.5-49.5	49.5-59.5	59.5-69.5
frequency	6	10	16	14	8	4

Range = L - S

= 69.5 - 9.5

= 60

$Coefficient of range = \frac{L-S}{L+S}$

$\frac{69.5-9.5}{69.5+9.5}$

$= 0.76$

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