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
Palmorg.xls
(13.5 KB)
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


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