Question

Class interval- 100-120,120-140,140-160,160-180,180-200 and frequencies are10,20,30,15,5. Find the arithmetic mean​

Answer 1

Answer:

Here's your answer

Step-by-step explanation:

Let mean=150

⇒A=150

⇒ Mean=A+

∑f

∑fd

=150+

8ϕ

(−30ϕ)

=150−

4

15

=150−3.75

=146.25.