Question on: JAMB Economics - 2017
Given that ∑fx = 340 and N = 20, find the arithmetic mean.
A
20
B
17
C
32
D
9
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Correct Option: B
Arithmetic mean, x̄= ∑fx
n
where:
x̄= Arithmetic mean
∑ = sum of
X = series of figures in a given data
f = nunmber of times a particular number occurs (frequency)
n = number of figures or element
From the question:
Since, x̄= ∑fx
N
Then, x̄= ∑fx
N
=\(\frac{340}{20}\)
= 17
n
where:
x̄= Arithmetic mean
∑ = sum of
X = series of figures in a given data
f = nunmber of times a particular number occurs (frequency)
n = number of figures or element
From the question:
Since, x̄= ∑fx
N
Then, x̄= ∑fx
N
=\(\frac{340}{20}\)
= 17
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