Question

Construct a frequency table for the following weights (in gm) of 35 mangoes using the equal class intervals, one of them is 40 - 45 (45 not included) :

30, 40, 45, 32, 43, 50, 55, 62, 70, 70, 61, 62, 53, 52, 50, 42, 35, 37, 53, 55, 65, 70, 73, 74, 45, 46, 58, 59, 60, 62, 74, 34, 35, 70, 68

(i) What is the class mark of the class interval 40 - 45?

(ii) What is the range of the above weights?

(iii) How many classes are there?

Answer 1

Weight(in gram)	No. of mangoes
30 - 35	4
35 - 40	1
40 - 45	3
45 - 50	3
50 - 55	7
55 - 60	7
60 - 65	6
65 - 70	5
70 - 75	3

(i) Class mark of class interval 40 – 45 = \(\frac{40+45}{2}\) = 42.5.

(ii) Range of the weights = 74 – 30 = 44.

(iii) Number of classes = 9.