Page 181 - Artificial Intellegence_v2.0_Class_11
P. 181
MEAN (Frequency Distribution Series) Direct Method
1. Find mid values m= (l + l )/2
1 2
2. Find fm
Wages m= f fm
(x) (l + l )/2 3. Find ∑ fm and ∑ f
1
2
4. Apply formula
0 – 100 50 2 100
100 – 200 150 1 150 ∑ fm
X = f
200 – 300 250 3 750 ∑
300 – 400 350 3 1050 2500
=
400 – 500 450 1 450 10
∑f = ∑fm= =
10 2500 250
Median
In statistics, the median is the middle value in a given list of numbers arranged in ascending or descending order.
MEDIAN (Individual Series):
Wages Wages 1. Arrange Data in Ascending Order
(X) (X)
2. Median =
500 100
1 th
200 200 n1 + item
2 Size of 2
100 300
3 th
300 400 = 5 + 1
2 item
400 500
N = 5 = 3 item
rd
= 300
What if there are even number of items. Lets see!
Maths for AI 179

