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Mean
Measures of Central Median
Tendency
Mode
Mean
Mean is an essential concept in statistics. The mean is the average or the most common value in a group of numbers.
MEAN Direct Method
(Individual Series):
1. Find ∑x by adding all the values
Wages
(x) ∑x = 1500
100
2. Find total number of items (N)
200
300 N=5
400
3. Apply formula
500
∑ x = 1500 ∑ x 1500
X = = = 300
N 5
MEAN (Discrete Series): Direct Method
(Frequency Array)
Wages f fx 1. Find fx
(X)
2. Find ∑ fx and ∑ f
100 2 200
200 1 200 3. Apply formula
300 3 900 ∑ fx
X =
400 3 1200 ∑ f
500 1 500
= 3000
∑f = ∑fx= 10
10 3000
= 300
178 Touchpad Artificial Intelligence (Ver. 2.0)-XI

