Question
Class Interval Frequency (fi) Cumulative Frequency (F) 120-<130 1 1 130-<140 3 4 140-<150 8 12...
|
Class Interval |
Frequency (fi) |
Cumulative Frequency (F) |
|
120-<130 |
1 |
1 |
|
130-<140 |
3 |
4 |
|
140-<150 |
8 |
12 |
|
150-<160 |
5 |
17 |
|
160-<170 |
3 |
20 |
|
∑fi = 20 |
1. Find the Coefficient of Variation
Homework Answers
Answer #1
Midpoint = (Upper class Limit + Lower
class limit) / 2
Midpoint = (120+130)/2 = 125 (For, first class)
(130+140)/2 = 135 (For, second class)
and so on ...
Computational Table:
Mean =
Standard deviation = S =
Coefficient of Variation (CV) =
CV = (S / 
) * 100
CV = (10.81 / 148)*100
CV = 7.30%
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