1.

From the following data calculate range and coefficient of range:Marks15253545556575No. of Students9118352074

Answer»
MarksNo. of Students
159
2511
358
4535
5520
657
754

Highest value (H) = 75

Lowest value (L) = 15

Range = Highest value − Lowest value

or, R = 75 − 15= 60 marks

Coefficient of Range = \(\frac{H-L}{H+L}=\frac{75-15}{75+15}=\frac{60}{90}=0.66\)

Hence, range is 60 and coefficient of range is 0.66



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