Find the mean deviation of 1, 2, 3 and 4
A
1.0
B
1.5
C
2.0
D
2.5
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
_
Mean deviation = Σ|x - x|
n
_
x = 2.5
= |1 - 2.5| + |2 - 2.5| + |3 - 2.5| + |4 - 2.5|
4
= 4/4 = 1
Source: WAEC / JAMB / NECO Classroom Archive (Record #60671)