find mean from the following frequency distribution : class interval 15-25 25-30 35-45 45-55 55-65 65-75 frequency: 4 11 19 14 0 2
Answers
Answer:
which which class this is????...
Step-by-step explanation:
Class Interval Frequency(f) Mid Value(x) f × x
15-25 4 20 80
25-30 11 27.5 302.5
35-45 19 40 760
45-55 14 50 700
55-65 0 60 0
65-75 2 70 140
∑f = 50 ∑(f × x)= 1982.5
Mean = ∑(f × x)/∑f
= 1982.5/50
= 39.65