Databaserad sannolikhetslära
Seminarium 2
F-test (Globalt test) finns med i ANOVA-tablå → Signifikans
K = antal x-värden.
SPSS (dummy variabel) ska vara Numeric och nominal, men kan välja labels (1 - ja, 0 - nej)
Tentauppgifter (uppgift 3-4)
A sawing mill produces planks of different lengths. Following is a sample of the number of
defects compared to the lengths of the planks.
Length
(X)
4
5
6
7
8
9
10
11
12
13
14
Defects
(Y)
16
12
25
42
35
39
42
40
38
49
60
●Develop a scatter diagram.●Determine the regression equation (regressionslinje).
●Determine the expected value when the length is 10.
●Determine the correlation coefficient.
4. Given the following software output.
Regression Analysis
ANOVA Table
Source
SUM OF SQUARES
df
MEAN SQUARE
F
Sign.
Regression
227.0928
4
56.7732
9.27
.000
Residual
153.0739
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- Fall '19
- Statistics, Regression Analysis, Databaserad sannolikhetslära
