please explain thoroughly the Test of Homogeneity of Variances and Why Post Hoc Tukey HSD is the appropriate model. thanks

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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please explain thoroughly the Test of Homogeneity of Variances and Why Post Hoc Tukey HSD is the appropriate model. thanks

Oneway
X18 - Delivery Speed
Less than 1 year
1 to 5 years
Over 5 years
Total
Test of Homogeneity of Variances
X18 - Delivery Speed
Levene Statistic
X18 - Delivery Speed
Between Groups
Within Groups
Total
Post Hoc
N Mean Std. Deviation Std. Error
323.172|
.6150 .1087
35 4.243
.5731
.0969
33 4.200
.4500 .0783
100 3.886
.7344
.0734|
.866
df1df2 Sig.
2 97 424
Games-
Howell
Dependent Variable:X18 - Delivery Speed
Sum of Squares df Mean Square F Sig.
24.030 2
12.015 39.681.000
.303
29.370 97
53.400 99
(1) X1 Customer
Type
Tukey HSD Less than 1 year
ANOVA
1 to 5 years
(J) X1 - Customer
Type
1 to 5 years
Over 5 years
Less than 1 year
Over 5 years
Less than 1 year
1 to 5 years
1 to 5 years
Over 5 years
Less than 1 year
Over 5 years
Less than 1 year
1 to 5 years
*. The mean difference is significant at the 0.05 level.
Homogeneous
Over 5 years
Less than 1 year
1 to 5 years
Descriptives
Over 5 years
95% Confidence Interval for Mean
Lower Bound
X18 - Delivery Speed
Multiple Comparisons
Subset for alpha = 0.05
1
2
3.172
2.950
4.046
4.040
3.740
Mean Difference
(I-J)
X1 - Customer Type N
Tukey HSDa Less than 1 year 32
Over 5 years
33
1 to 5 years
35
Sig.
1.000
Means for groups in homogeneous subsets are displayed.
a. Uses Harmonic Mean Sample Size = 33.287.
4.200
4.243
.946
Upper Bound Minimum Maximum
3.394
4.440
4.360
4.032
Std.
Error Sig.
.1346.000
.1365.000
-1.0710*
-1.0281*
1.0710
.0429
1346.000
1335.945
1.0281* .1365.000
-.0429 1335.945
-1.0710* .1456.000
-1.0281* 1340.000
1.0710* .1456.000
.0429 .1246.937
1.0281* .1340.000
-.0429 .1246.937
1.6
3.0
3.3
1.6
95% Confidence
Interval
Lower
Bound
-1.391
-1.353
.751
-.275
.703
-.361
-1.420
-1.351
4.4
5.5
4.9
5.5
.722
-.256
.706
-.342
Upper
Bound
-.751
-.703
1.391
.361
1.353
.275
-.722
-.706
1.420
.342
1.351
.256
Transcribed Image Text:Oneway X18 - Delivery Speed Less than 1 year 1 to 5 years Over 5 years Total Test of Homogeneity of Variances X18 - Delivery Speed Levene Statistic X18 - Delivery Speed Between Groups Within Groups Total Post Hoc N Mean Std. Deviation Std. Error 323.172| .6150 .1087 35 4.243 .5731 .0969 33 4.200 .4500 .0783 100 3.886 .7344 .0734| .866 df1df2 Sig. 2 97 424 Games- Howell Dependent Variable:X18 - Delivery Speed Sum of Squares df Mean Square F Sig. 24.030 2 12.015 39.681.000 .303 29.370 97 53.400 99 (1) X1 Customer Type Tukey HSD Less than 1 year ANOVA 1 to 5 years (J) X1 - Customer Type 1 to 5 years Over 5 years Less than 1 year Over 5 years Less than 1 year 1 to 5 years 1 to 5 years Over 5 years Less than 1 year Over 5 years Less than 1 year 1 to 5 years *. The mean difference is significant at the 0.05 level. Homogeneous Over 5 years Less than 1 year 1 to 5 years Descriptives Over 5 years 95% Confidence Interval for Mean Lower Bound X18 - Delivery Speed Multiple Comparisons Subset for alpha = 0.05 1 2 3.172 2.950 4.046 4.040 3.740 Mean Difference (I-J) X1 - Customer Type N Tukey HSDa Less than 1 year 32 Over 5 years 33 1 to 5 years 35 Sig. 1.000 Means for groups in homogeneous subsets are displayed. a. Uses Harmonic Mean Sample Size = 33.287. 4.200 4.243 .946 Upper Bound Minimum Maximum 3.394 4.440 4.360 4.032 Std. Error Sig. .1346.000 .1365.000 -1.0710* -1.0281* 1.0710 .0429 1346.000 1335.945 1.0281* .1365.000 -.0429 1335.945 -1.0710* .1456.000 -1.0281* 1340.000 1.0710* .1456.000 .0429 .1246.937 1.0281* .1340.000 -.0429 .1246.937 1.6 3.0 3.3 1.6 95% Confidence Interval Lower Bound -1.391 -1.353 .751 -.275 .703 -.361 -1.420 -1.351 4.4 5.5 4.9 5.5 .722 -.256 .706 -.342 Upper Bound -.751 -.703 1.391 .361 1.353 .275 -.722 -.706 1.420 .342 1.351 .256
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