January 2014
Intermediate to advanced
144 pages
4h 2m
English
Content preview from Mathematical Formulas for Industrial and Mechanical Engineering
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6.8 Coefficient of Variation
CV ð%Þ5
standard deviation
mean
3 100
6.9 Sample Covariance
s
xy
5
P
ðx
i
2 xÞðy
i
2 yÞ
n 2 1
6.10 Range
Range 5 largest data value 2 smallest data value.
6.11 Central Limit Theorem
z 5
x 2 μ
σ =
ffiffiffi
n
p
; n $ 30
6.12 Counting Rule for Combinations
n
C
r
5
n!
r!ðn 2 rÞ!
6.13 Counting Rule for Permutations
n
P
r
5
n!
ðn 2 rÞ!
6.14 Properties of Probability
Let
P denotes a probability
A, B, C denote specific events
115Statistics and Probability
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