Pressure Load /Aircraft Fastener Study 1
13:27 Sunday, January 9, 2000
The LOGISTIC Procedure
Data Set: WORK.AIRCRAFT
Response Variable (Events): FAILURES
Response Variable (Trials): TOTAL
Number of Observations: 10
Link Function: Logit
Response Profile
Ordered Binary
Value Outcome Count
1 EVENT 337
2 NO EVENT 353
Model Fitting Information and Testing Global Null Hypothesis BETA=0
Intercept
Intercept and
Criterion Only Covariates Chi-Square for Covariates
AIC 958.172 847.712 .
SC 962.709 856.785 .
-2 LOG L 956.172 843.712 112.460 with 1 DF (p=0.0001)
Score . . 107.066 with 1 DF (p=0.0001)
Analysis of Maximum Likelihood Estimates
Parameter Standard Wald Pr > Standardized Odds
Variable DF Estimate Error Chi-Square Chi-Square Estimate Ratio
INTERCPT 1 -5.3397 0.5457 95.7500 0.0001 . .
PSI 1 0.00155 0.000158 96.6085 0.0001 0.481061 1.002
Association of Predicted Probabilities and Observed Responses
Concordant = 68.0% Somers' D = 0.452
Discordant = 22.9% Gamma = 0.497
Tied = 9.1% Tau-a = 0.226
(118961 pairs) c = 0.726
Pressure Load /Aircraft Fastener Study 2
13:27 Sunday, January 9, 2000
The LOGISTIC Procedure
Classification Table
Correct Incorrect Percentages
------------ ------------ -------------------------------------
Prob Non- Non- Sensi- Speci- False False
Level Event Event Event Event Correct tivity ficity POS NEG
------------------------------------------------------------------------
0.500 241 224 129 96 67.4 71.5 63.5 34.9 30.0
0.400 259 202 151 78 66.8 76.9 57.2 36.8 27.9
0.600 144 302 51 193 64.6 42.7 85.6 26.2 39.0