Click here to load reader
Upload
stanimir-pirocanac
View
17
Download
2
Embed Size (px)
DESCRIPTION
vezba za samostalan rad
Citation preview
: 21
: ( )
1
: MS Excel-
21 Excel-
. , . .
77 18 8 20 6 25 5 87 27 2 , 28 2 32 1
(scatter diagram), . , Y . 1.
0123456789
0 5 10 15 20 25 30 35
1.
MS Excel- ( ), ( ).
: 21
: ( )
2
x y.
:
x = (18+20+25+27+28+32)/6 = 150/5 = 25 :
y = (8 +6+5+2+2+1+)/6 = 24/6 = 4
1.
1.
18 25 -7 8 4 4 -28 20 25 -5 6 4 2 -10 25 25 0 5 4 1 0 27 25 2 2 4 -2 -4 28 25 3 2 4 -2 -6 32 25 7 1 4 -3 -21
1
( )( ) 69= yyxx
( )( ) 8.13569
1=
=
= nyyxxCovXY
n , 6.
, . . , 2.
2.
^2 ^2
18 25 -7 49 8 4 4 16 -28 20 25 -5 25 6 4 2 4 -10 25 25 0 0 5 4 1 1 0 27 25 2 4 2 4 -2 4 -4 28 25 3 9 2 4 -2 4 -6 32 25 7 49 1 4 -3 9 -21
136 38 -69
:
( )22.5
5136
1
2
==
=
nxx
Sx
( )76.2
538
1
2
==
=
nyy
S y
: 21
: ( )
3
96.076.222.5
8.13=
=
=yx
XY
SSCovr
-0.96 .
R2=0.92
92% .
, , . . , Excel-. , Excel . , Add Trendline ... , 2.
2.
, Option Display equation in chart, Display R-squared value on chart, ( , trendline) 3.
Chart Title y = -0.5074x + 16.684R2 = 0.9212
0123456789
0 5 10 15 20 25 30 35
Linear ( )
3.
684.165074.0 += xy . (1)
, Y 5074.0=b 684.16=a .
: 21
: ( )
4 (1) . 23,
5.0138684.16)235074.0( =+
.
Excel-
Excel- CORREL, , 4.
4. Excel-
(Standard Error of Estimation) , . Excel- STEYX, 5.
5. Excel-
, 3.
3. , -0.95981568 0.92124613 0.864963447
.
: 21
: ( )
5
1
( ).
T 12 15 17 19 21 25 28 31 35 39 7 6.4 6.2 6 6.3 6.8 7.2 7.5 8 9
1. .
2. , .
3. .
4. 18 37 .
2
. .
5 15 25 30 40 50 75 100 120 (3) 0.2 0.4 0.8 1.1 1.4 1.7 1.5 1.6 1.6
1. .
2. , .
3. .
4. 85 .
5. , ( ).
21 Excel-