Model Summary (Mean time to repair (hours) )
R R Square Adjusted R Square Std. Error of the Estimate
.94 .89 .88 6.54
ANOVA (Mean time to repair (hours) )
Sum of Squares df Mean Square F Sig.
Regression 9576.26 2 4788.13 111.94 .000
Residual 1154.94 27 42.78
Total 10731.20 29
Coefficients (Mean time to repair (hours) )
Unstandardized Coefficients Standardized Coefficients t Sig.
B Std. Error Beta
(Constant) 10.59 3.11 .00 3.40 .002
Mean time between failures (months) 3.02 .20 .95 14.88 .000
Ratio of working to non-working time -1.12 3.69 -.02 -.30 .763
Model Summary (Mean time to repair (hours) )
R R Square Adjusted R Square Std. Error of the Estimate
.94 .89 .89 6.43
ANOVA (Mean time to repair (hours) )
Sum of Squares df Mean Square F Sig.
Regression 9572.30 1 9572.30 231.28 .000
Residual 1158.90 28 41.39
Total 10731.20 29
Coefficients (Mean time to repair (hours) )
Unstandardized Coefficients Standardized Coefficients t Sig.
B Std. Error Beta
(Constant) 9.90 2.10 .00 4.71 .000
Mean time between failures (months) 3.01 .20 .94 15.21 .000