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eBook To test for any significant difference in the mean number of hours between breakdowns for...
eBook To test for any significant difference in the mean number of hours between breakdowns for four machines, the following data were obtained. Machine 1 Machine 2 Machine 3 Machine 4 6.4 8.7 11.1 9.9 7.8 7.4 10.3 12.8 5.3 9.4 9.7 12.1 7.4 10.1 10.3 10.8 8.4 9.2 9.2 11.3 7.3 9.8 8.8 11.5 The mean times between breakdowns are 7.1, 9.1, 9.9 and 11.4 hours respectively. In the analysis of variance, MSTR = 19.26 and MSE = .97. Use the Bonferroni adjustment to test for a significant difference between all pairs of means. Assume that a maximum overall experiment error rate of .05 is desired. There are six pairwise comparisons among the 4 machines. What error rate should be used for each pairwise comparison (to 4 decimals)? Using t = 2.845 for the above error rate, calculate the Bonferroni LSD value (to 2 decimals). Complete the table below to determine whether there are any significant differences between population means. Difference Absolute Value Conclusion 1 - 2 1 - 3 1 - 4 2 - 3 2 - 4 3 - 4
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To test for any significant difference in the mean number of hours between breakdowns for four...
To test for any significant difference in the mean number of
hours between breakdowns for four machines, the following data were
obtained.
Machine 1
Machine 2
Machine 3
Machine 4
6.4
8.7
11.1
9.9
7.8
7.4
10.3
12.8
5.3
9.4
9.7
12.1
7.4
10.1
10.3
10.8
8.4
9.2
9.2
11.3
7.3
9.8
8.8
11.5
The mean times between breakdowns are 7.1, 9.1, 9.9 and 11.4
hours respectively. In the analysis of variance, MSTR = 19.26 and
MSE = .97. Use...
To test for any significant difference in the mean number of hours between breakdowns for four...
To test for any significant difference in the mean number of
hours between breakdowns for four machines, the following data were
obtained.
Machine 1
Machine 2
Machine 3
Machine 4
6.4
8.7
11.1
9.9
7.8
7.4
10.3
12.8
5.3
9.4
9.7
12.1
7.4
10.1
10.3
10.8
8.4
9.2
9.2
11.3
7.3
9.8
8.8
11.5
The mean times between breakdowns are 7.1, 9.1, 9.9 and 11.4
hours respectively. In the analysis of variance, MSTR = 19.26 and
MSE = .97. Use...
To test for any significant difference in the number of hours between breakdowns for four machines,...
To test for any significant difference in the number of hours
between breakdowns for four machines, the following data were
obtained.
Machine
1
Machine
2
Machine
3
Machine
4
6.4
9.1
11.0
9.7
7.8
7.8
10.2
12.5
5.4
9.7
9.7
11.7
7.5
10.3
10.3
10.5
8.5
9.6
9.2
11.0
7.0
9.9
8.4
11.2
a) At the α = 0.05 level of significance, what is the
difference, if any, in the population mean times among the four
machines?
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To test for any significant difference in the number of hours between breakdowns for four machines,...
To test for any significant difference in the number of hours
between breakdowns for four machines, the following data were
obtained.
Machine
1
Machine
2
Machine
3
Machine
4
6.4
8.8
10.9
9.7
7.9
7.6
10.3
12.6
5.5
9.5
9.6
11.8
7.5
10.3
10.2
10.7
8.4
9.3
9.0
11.0
7.5
10.3
8.8
11.4
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Manufacture
1
2
3
18
30
24
27
24
18
24
33
27
21
27
21
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1
2
3
18
27
24
24
24
18
21
30
27
21
24
21
a. Compute the values below (to 2 decimals, if necessary).
Sum of Squares, Error
Mean Squares, Error
Fisher's LSD Value
b. Use Fisher's LSD...
1. if a statistically significant difference was found between two means using an independent-samples t test,...
1. if a statistically significant difference was found between
two means using an independent-samples t test, which of the
following interpretations would be correct.
A) something over and above sampling error is responsible for
the difference between sample means
B) the difference between two means is meaningful.
C)it is unlikely that something other than error is responsible
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D) the difference between the two means is due to a large effect
size
2. in...
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is the same for machines produced by three manufacturers, a
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minutes) needed to mix the material.
Manufacturer
1
2
3
19
29
21
25
27
19
24
32
23
28
28
25
(a)
Use these data to test whether the population mean times for
mixing a batch of material differ for the three manufacturers.
Use
α =...
To test whether the mean time needed to mix a batch of material is the same...
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is the same for machines produced by three manufacturers, the
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The following data are from a completely randomized design. Treatment Treatment Treatment A B C 32...
The following data are from a completely randomized design.
Treatment
Treatment
Treatment
A
B
C
32
46
33
30
45
36
30
46
35
26
48
36
32
50
40
Sample mean
30
47
36
Sample variance
6
4
6.5
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