问题是这样的:A retailer of hand-held organizers wants to relate the ownership of the devices with annual income of the purchaser. Data is collected on 20 people and can be found in the file
如果我不将收入分类,直接run出来的结果是income的相关性不高的,但是我又不知该如何分类。我试过按收入区间20000-30000,30000-40000这样分类,但结果还是不行。的确同样量太小了,但如果非要计算,该如何呢?在此求助了!!谢谢!!
The LOGISTIC Procedure
Model Information
Data Set _PROJ_.PALMORG
Response Variable Ownership Ownership
Number of Response Levels 2
Number of Observations 20
Model binary logit
Optimization Technique Fisher's scoring
Response Profile
Ordered Total
Value Ownership Frequency
1 1 7
2 0 13
Probability modeled is Ownership=1.
Model Convergence Status
Convergence criterion (GCONV=1E-8) satisfied.
Model Fit Statistics
Intercept
Intercept and
Criterion Only Covariates
AIC 27.898 29.193
SC 28.894 31.184
-2 Log L 25.898 25.193
Testing Global Null Hypothesis: BETA=0
Test Chi-Square DF Pr > ChiSq
Likelihood Ratio 0.7051 1 0.4011
Score 0.7045 1 0.4013
Wald 0.6778 1 0.4104
Analysis of Maximum Likelihood Estimates
Standard Wald
Parameter DF Estimate Error Chi-Square Pr > ChiSq
Intercept 1 -1.6008 1.3041 1.5068 0.2196
income 1 0.000022 0.000027 0.6778 0.4104
1 17:47 Saturday, February 15, 2003 2
The LOGISTIC Procedure
Odds Ratio Estimates
Point 95% Wald
Effect Estimate Confidence Limits
income 1.000 1.000 1.000
Association of Predicted Probabilities and Observed Responses
Percent Concordant 70.3 Somers' D 0.418
Percent Discordant 28.6 Gamma 0.422
Percent Tied 1.1 Tau-a 0.200
Pairs 91 c 0.709