Find out range and quartile deviation from the following marks obtained by 10 students .
90 , 64 , 79 , 33, 85 , 59 , 60 , 70 , 40 , 95

Explanation

Range = highest value - lowest value
= 95-33 = 62 marks
Quartile Deviation (Q)
` Q_(1) = 54.25`
`Q_(3) = 86.25`
`Q = (Q_(3) - Q_(1))/(2) = (86.25 - 54.25)/(2) = (32)/(2)`
= 16 marks