ML Aggarwal Solution Class 9 Chapter 20 Statistics Exercise 20.2
Exercise 20.2 Question 1 Sol : (i) discrete (ii) continuous (iii) discrete (iv) continuous (v) continuous Question 2 Sol : Given data 13, 6, 10 ,5 ,11 ,14 ,2 ,8 ,15 ,16 ,9 ,13 ,17 ,11, 19 ,5 ,7 ,12 ,20 ,21 ,18 ,1 ,8 ,12 ,18 Classes 0-4 5-9 10-14 15-9 20-24 Frequency 2 7 8 6 2 Question 3 Sol : (i) Classes 1-10 11-20 21-30 31-40 Frequency 8 7 6 6 (ii) Range = Maximum value - Minimum value =40-2=38 (iii) Third class of frequency table $=\frac{21+30}{2}=\frac{51}{2}$ =25.5 Question 4 Sol : Variate : A particular value of a variable is called variate Class size : The difference between the actual upper limit and the actual lower li