Plz solve this ..it’s really urgent
Answers
Answer:
Step-by-step explanation:
C-I (f) (x) d = (x-A) d' = d/i d'(f)
0-10 5 5 -20 -20/10 = -2 -2 x 5 = -10
10-20 10 15 -10 -10/10 = -1 -1 x 10 = -10
20-30 18 25 0 0/10 = 0 0 x 18 = 0
30-40 30 35 10 10/10 = 1 1 x 30 = 30
40-50 20 45 20 20/10 = 2 2 x 20 = 40
50-60 12 55 30 30/10 = 3 3 x 12 = 36
60-70 5 65 40 40/10 = 4 4 x 5 = 20
∑f = 100 ∑d'f = 106
illustration:
x = mid values of C.I i-e, 0+10/2 = 5 and so on.
A = assumed mean, I took A=25 above.
Hence d= (x-A) => 5-25 = -20 and so on.
i = Interval gap which is 10. i-e 0-10, 10-20 and so on.
Step-2:
Step Deviation Formula:
x (bar) = A + ∑d'f / ∑f x i
x(bar) = 25 + 106/100 x 10
x(bar) = 178/5
x(bar) = 35.6 ≅ 36 ( Answer )