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omer Type (X1) is: 1 = less than 1 year 2 = between 1 year an

omer Type (X1) is: 1 = less than 1 year 2 = between 1 year an

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Is there a significant difference on the ratings of the respondents on Delivery Speed – X18) when grouped according to Customer Type – X1?

The coding for Customer Type (X1) is:
1 = less than 1 year
2 = between 1 year and 5 years
3 = longer than 5 years


The coding for Delivery Speed (X18) is:
0 = Poor 
10 = Excellenet


Interpret/Explain the One-Way ANOVA test result found in the attached image file

X18 Delivery Speed Less than 1 year 1 to 5 years Over 5 years Total X18 Delivery Speed Levene Statistic .866 X18 Delivery Speed Between Groups Within Groups Total Post Hoc Test of Homogeneity of Variances Tukey HSD df1 Games-Howell N Tukey HSD 32 35 33 100 2 Sum of Squares Homogeneous 24.030 29.370 53.400 1 to 5 years Mean Over 5 years Dependent Variable:X18 - Delivery Speed 3.172 4.243 (1) X1- Customer Type Less than 1 year 4.200 3.886 1 to 5 years df2 Over 5 years Less than 1 year 97 df Std. Deviation .6150 .5731 .4500 .7344 ANOVA Sig. 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. .424 N 2 97 99 (J) X1- Customer Type 1 to 5 years Over 5 years Less than 1 year Over 5 years. Less than 1 year X18 - Delivery Speed Mean Square 12.015 .303 32 33 35 Descriptives Std. Error .1087 .0969 .0783 .0734 X1 Customer Type Less than 1 year Over 5 years 1 to 5 years Sig. 1.000 Means for groups in homogeneous subsets are displayed. a. Uses Harmonic Mean Sample Size = 33.287. Multiple Comparisons F 39.681 Mean Difference (1- J) -1.0710' -1.0281' 1.0710' .0429 1.0281' -.0429 -1.0710' -1.0281' 1.0710' .0429 1.0281' -.0429 Subset for alpha= 0.05 1 2 3.172 95% Confidence Interval for Mean Lower Bound 2.950 4.046 4.200 4.243 .946 4.040 3.740 Siq. .000 Std. Error 1346 .1365 .1346 .1335 .1365 .1335 1456 .1340 .1456 .1246 .1340 .1246 Upper Bound 3.394 4.440 4.360 4.032 Siq. .000 .000 .000 945 .000 945 .000 .000 .000 .937 .000 .937 Minimum 1.6 3.0 3.3 1.6 Maximum 4.4 5.5 4.9 5.5 95% Confidence Interval Lower Bound. Upper Bound -1.391 -.751 -1.353 -.703 .751 1.391 -.275 .361 .703 1.353 -.361 .275 -1.420 -.722 -1.351 -.706 .722 1.420 -.256 .342 .706 1.351 -.342 .256
Transcribed Image Text:X18 Delivery Speed Less than 1 year 1 to 5 years Over 5 years Total X18 Delivery Speed Levene Statistic .866 X18 Delivery Speed Between Groups Within Groups Total Post Hoc Test of Homogeneity of Variances Tukey HSD df1 Games-Howell N Tukey HSD 32 35 33 100 2 Sum of Squares Homogeneous 24.030 29.370 53.400 1 to 5 years Mean Over 5 years Dependent Variable:X18 - Delivery Speed 3.172 4.243 (1) X1- Customer Type Less than 1 year 4.200 3.886 1 to 5 years df2 Over 5 years Less than 1 year 97 df Std. Deviation .6150 .5731 .4500 .7344 ANOVA Sig. 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. .424 N 2 97 99 (J) X1- Customer Type 1 to 5 years Over 5 years Less than 1 year Over 5 years. Less than 1 year X18 - Delivery Speed Mean Square 12.015 .303 32 33 35 Descriptives Std. Error .1087 .0969 .0783 .0734 X1 Customer Type Less than 1 year Over 5 years 1 to 5 years Sig. 1.000 Means for groups in homogeneous subsets are displayed. a. Uses Harmonic Mean Sample Size = 33.287. Multiple Comparisons F 39.681 Mean Difference (1- J) -1.0710' -1.0281' 1.0710' .0429 1.0281' -.0429 -1.0710' -1.0281' 1.0710' .0429 1.0281' -.0429 Subset for alpha= 0.05 1 2 3.172 95% Confidence Interval for Mean Lower Bound 2.950 4.046 4.200 4.243 .946 4.040 3.740 Siq. .000 Std. Error 1346 .1365 .1346 .1335 .1365 .1335 1456 .1340 .1456 .1246 .1340 .1246 Upper Bound 3.394 4.440 4.360 4.032 Siq. .000 .000 .000 945 .000 945 .000 .000 .000 .937 .000 .937 Minimum 1.6 3.0 3.3 1.6 Maximum 4.4 5.5 4.9 5.5 95% Confidence Interval Lower Bound. Upper Bound -1.391 -.751 -1.353 -.703 .751 1.391 -.275 .361 .703 1.353 -.361 .275 -1.420 -.722 -1.351 -.706 .722 1.420 -.256 .342 .706 1.351 -.342 .256
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