Quiz (WK6)
1
. Analysis of variance is used to (Points : 1)
compare nominal data.
compute t test.
compare population proportion.
Simultaneously compare several population means.
2.
Suppose a package delivery company purchased 14 trucks at the same time. Five trucks were
purchased from manufacturer A, four from B and five from manufacturer C. The cost of maintaining
each truck was recorded. The company used ANOVA to test if the mean maintenance cost of the trucks
from each manufacturer were equal. To apply the F test, how many degrees of freedom are in the
denominator? (Points : 1)
2
3
11
14
3.
A manufacturer of automobile transmissions uses three different processes. The management
ordered a study of the production costs to see if there is a difference among the three processes. A
summary of the findings is shown below.
What is the mean square for error? (Points : 1)
2.511
2.151
33.9
29.035
4.
A manufacturer of automobile transmissions uses three different processes. The management
ordered a study of the production costs to see if there is a difference among the three processes. A
summary of the findings is shown below.
Process
1
Process
2
Process
3
Total
Process
Totals
($
100's)
137
108
107
352
Sample
Size
10
10
10
30
Sum of
Squares
1893
1188
1175
4256
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
What is the sum of squares of the error? (Points : 1)
67.80
58.07
149.34
23.47
5.
A manufacturer of automobile transmissions uses three different processes. The management
ordered a study of the production costs to see if there is a difference among the three processes. A
summary of the findings is shown below.
This is the end of the preview.
Sign up
to
access the rest of the document.
 Fall '10
 RandallBarcus
 Regression Analysis, independent variables

Click to edit the document details