Question

Class interval 100-120 120-140 140-160 160-180 180-200 Frequency 10 20 30 15 5
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Answer 1

Answer:

Let mean=150

⇒A=150

⇒ Mean=A+

∑f

∑fd

=150+

8ϕ

(−30ϕ)

=150−

4

15

=150−3.75

=146.25.

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Answer 2

answer

mean of the following data is 146.25.