Find the class intervals if arithmetic mean is 33 and assumed mean is 35 and the data is Class size is -3,-2,-1,0,1,2
Frequency is 5,10,25,30,20,10
Answers
Step-by-step explanation:
Given Find the class intervals if arithmetic mean is 33 and assumed mean is 35 and the data is Class size is -3,-2,-1,0,1,2
Frequency is 5,10,25,30,20,10
Step deviation Frequency f d
-3 5 - 15
-2 10 -20
-1 25 -25
0 30 0
1 20 20
2 10 20
N = 100 ∑ f d = - 20
Now α = x + (∑ f d / N x c)
Given α = 33 and x = 35
Therefore 33 = 35 + (- 20 / 100 x c)
33 = 35 – 20 c / 100
33 – 35 = - c / 5
Or 2 = c/5
Or c = 10
Now the magnitude of class interval is 10.
So deviation from assumed mean = mid-value – assumed mean
Or m = d + x
Now d d x c d + x class interval
-3 - 30 (- 20 + 35) = 5 0 – 10
- 2 - 20 15 10 – 20
- 1 - 10 25 20 – 30
0 0 35 30 – 40
1 10 45 40 – 50
2 20 55 50 - 60
Reference link will be
https://brainly.in/question/5494441
Answer:
the assumend mean egual to 33 class