Question

Q.19 Find the mean of the following data : Class 200-299 300-399 400-499 500-599 600-699 700-799 800-899 Frequency 3 61 118 139 126 151 2​

Answer 1

Step-by-step explanation:

A grouped frequency table with class intervals of equal sizes using 250-270 (270 not included in this interval) as one of the class interval is constructed for the following data:268, 220, 368, 258, 242, 310, 272, 342, 310, 290, 300, 320, 319, 304,402, 318, 406, 292, 354, 278, 210, 240, 330, 316, 406, 215, 258, 236.The frequency of the class 370-390 is:

a. 0

b. 1

c. 3

d. 5

class 9th question