88 7: Statistical Calculations
Mean, Standard Deviations, and Summation
Statistics
<RXFDQFDOFXODWHWKHPHDQ VDPSOHVWDQGDUGGHYLDWLRQ
6
DQGSRSXODWLRQVWDQGDUGGHYLDWLRQ
σ
DQG
VXPPDWLRQVWDWLVWLFVQ
Σ
[DQG
Σ
[
RI[GDWD)RU[\GDWD
\RXFDQDOVRFDOFXODWHWKHPHDQVDPSOHVWDQGDUG
GHYLDWLRQDQGSRSXODWLRQVWDQGDUGGHYLDWLRQRIWKH\GDWD
DQGWKHVXPPDWLRQVWDWLVWLFV
Σ
\
Σ
\
DQG
Σ
[\
3RSXODWLRQVWDQGDUG
GHYLDWLRQRIWKH[
YDOXHV
3RSXODWLRQVWDQGDUG
GHYLDWLRQRIWKH\YDOXHV
LI\RXHQWHUHG\GDWD
\YDOXH
(VWLPDWHRI[IRUDJLYHQ
YDOXHRI\
&RUUHODWLRQFRHIILFLHQW
[YDOXH (VWLPDWHRI\IRUDJLYHQ
YDOXHRI[
6ORSHPRIFDOFXODWHG
OLQH
\LQWHUFHSWERIWKH
FDOFXODWHGOLQH
6ORSHPRIWKH
FDOFXODWHGOLQH
Keys Description
1XPEHURIGDWDSRLQWVHQWHUHG
6XPRIWKH[YDOXHV
6XPRIWKH\YDOXHV
6XPRIWKHVTXDUHVRIWKH[YDOXHV
6XPRIWKHVTXDUHVRIWKH\YDOXHV
6XPRIWKHSURGXFWVRIWKH[DQG\YDOXHV
Keys Description to Display
[
.book Page 88 Wednesday, June 21, 2000 5:19 PM