Formulas
¯x=∑n
i=1xi
nLocation Med : N+1
2Location Q1 : N+1
4Location Q3 : 3(N+1)
4
RIQ =Q3−Q1s2=1
n−1
n
∑
i=1
(xi−¯x)2Varia t i o n Range =max−min V=sx
¯x
Ap=¯x−Mode
sx
Ap=¯x−Median
sx
Skewness =3
!n
∑
i=1
1
n−1
(xi−¯x)3
s3Position =Rx−a
b
¯x=∑k
i=1xini
ns=!1
n−1
k
∑
i=1
(xi−¯x)2ni[
µ
−
σ
,
µ
+
σ
]:68% [
µ
−2
σ
,
µ
+2
σ
]:95%
[
µ
−3
σ
,
µ
+3
σ
]:99.7% z=x−
µ
σ
Ak=
k
∑
j=1
xjnjAi=
i
∑
j=1
xjnj
pi=Ni
Nqi=Ai
Ak
IL=∑k−1
i=1(pi−qi)
∑k−1
i=1pi
ID=∑r>s(xr−xs)nrns
(N−1)∑k
i=1xini
Ck=
k
∑
i=1
siH=
n
∑
i=1
s2
isxy =1
n−1
n
∑
i=1
(xi−¯x)(yi−¯y)rxy =sxy
sxsy
a=¯y−b¯xb=rsy
sx
ei=yi−ˆyiR2=r2
xy
Y=T+E+C+IWei ght i=piQi
∑n
j=1pjQj
P
Laspeyres =∑wi
0
pi
t
pi
0
×100 =∑pi
tqi
0
∑pi
0qi
0
×100 P
Paa sch e =∑wi
t
pi
t
pi
0
×100 =∑pi
tqi
t
∑pi
0qi
t
×100