Question

5. Calculate the mean of the following data, using direct method:
25-35
35-45
45–55
55-65
65–75
Class
6
10
8
12
4
Frequency
11
dot one direct method.​

Answer 1

Step-by-step explanation:

Class, Frequency ( f i ), Mid values ( x i ), ( f i × x i ). 25-35, 6, 30, 180. 35-45, 10, 40, 400. 45-55, 8, 50, 400. 55-65, 12, 60, 720. 65-75, 4, 70, 280. ∑ f 1 = ...