The frequency table below shows the percentages obtained in a Biometry test for a random sample of 60 students:
Interval fi xi F
[30 – 40) 5 b1 c1
[40 – 50) 12 b2 c2
[50 – 60) 18 b3 c3
[60 – 70) 15 b4 c4
[70 – a1) 7 b5 c5
[a1 – 90) 2 b6 c6
[90 – 100) 1 b7 c7
For the percentages obtained, find the range.
a)70
b)60
c)80
d)100
c) 80
To find the range, we subtract the minimum value from the maximum value in the data set. The maximum value in the data set is 100 and the minimum value is 30.
Therefore, the range is 100 - 30 = 70.
So none of the given options is correct.