Independent Samples Test
t-test for Equality of Means | ||
95% Confidence Interval of the Difference | ||
Upper | ||
QD | Equal variances assumed | .11269 |
Equal variances not assumed | .11261 |
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By level
Descriptions
QD
N | Mean | Std. Deviation | Std. Error | 95% Confidence Interval for Mean | ||
Lower Bound | Upper Bound | |||||
PTTH | 31 | 3.1613 | .54217 | .09738 | 2.9624 | 3.3602 |
TC, CD | 119 | 3.2395 | .47767 | .04379 | 3.1528 | 3.3262 |
UNIVERSITY | 58 | 3.2284 | .49843 | .06545 | 3.0974 | 3.3595 |
ON UNIVERSITY | 93 | 3.2204 | .51978 | .05390 | 3.1134 | 3.3275 |
Total | 301 | 3.2234 | .49971 | .02880 | 3.1667 | 3.2801 |
Test of Homogeneity of Variances
QD
Levene Statistic
df1 | df2 | Sig. | |
.274 | 3 | 297 | .844 |
ANOVA
QD
Sum of Squares | df | Mean Square | F | Sig. | |
Between Groups | .153 | 3 | .051 | .202 | .895 |
Within Groups | 74,760 | 297 | .252 | ||
Total | 74,912 | 300 |
By profession
QD |
N | Mean | Std. Deviation | Std. Error | 95% Confidence Interval for Mean | |
Lower Bound | |||||
Company and business leaders | 15 | 3.2500 | .48181 | .12440 | 2.9832 |
Company project management leader | 81 | 3.2346 | .50674 | .05630 | 3.1225 |
Civil design engineer | 110 | 3.2705 | .52367 | .04993 | 3.1715 |
Construction consultant engineer | 37 | 3.2365 | .43679 | .07181 | 3.0909 |
OTHER JOBS | 58 | 3.1034 | .48222 | .06332 | 2.9767 |
Total | 301 | 3.2234 | .49971 | .02880 | 3.1667 |
Descriptions | |||
QD | |||
95% Confidence Interval for Mean | Minimum | Maximum | |
Upper Bound | |||
Company and business leaders | 3.5168 | 2.75 | 4.25 |
Company project management leader | 3.3466 | 2.00 | 4.25 |
Civil design engineer | 3.3694 | 2.00 | 5.00 |
Construction consultant engineer | 3.3821 | 2.75 | 4.00 |
OTHER JOBS | 3.2302 | 2.00 | 4.25 |
Total | 3.2801 | 2.00 | 5.00 |
Test of Homogeneity of Variances
QD
Levene Statistic
df1 | df2 | Sig. | |
1.575 | 4 | 296 | .181 |
ANOVA
QD
Sum of Squares | df | Mean Square | F | Sig. | |
Between Groups | 1.105 | 4 | .276 | 1.108 | .353 |
Within Groups | 73,807 | 296 | .249 | ||
Total | 74,912 | 300 |