logit_analysis
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logit_analysis [2019/09/15 02:48] – hkimscil | logit_analysis [2019/09/18 07:56] (current) – removed hkimscil | ||
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- | ====== logit analysis ====== | ||
- | < | ||
- | mydata <- read.csv(" | ||
- | ## view the first few rows of the data | ||
- | head(mydata) | ||
- | </ | ||
- | < | ||
- | admit gre gpa rank | ||
- | 1 0 380 3.61 3 | ||
- | 2 1 660 3.67 3 | ||
- | 3 1 800 4.00 1 | ||
- | 4 1 640 3.19 4 | ||
- | 5 0 520 2.93 4 | ||
- | 6 1 760 3.00 2 | ||
- | </ | ||
- | |||
- | < | ||
- | </ | ||
- | |||
- | < | ||
- | | ||
- | | ||
- | 1st Qu.: | ||
- | | ||
- | | ||
- | 3rd Qu.: | ||
- | | ||
- | </ | ||
- | |||
- | < | ||
- | sapply(mydata, | ||
- | </ | ||
- | |||
- | < | ||
- | | ||
- | 0.3175 587.7000 | ||
- | > sapply(mydata, | ||
- | admit | ||
- | 0.4660867 115.5165364 | ||
- | > </ | ||
- | |||
- | < | ||
- | |||
- | < | ||
- | rank | ||
- | admit 1 2 3 4 | ||
- | 0 28 97 93 55 | ||
- | 1 33 54 28 12 | ||
- | </ | ||
- | |||
- | < | ||
- | mylogit <- glm(admit ~ gre + gpa + rank, data = mydata, family = " | ||
- | summary(mylogit) | ||
- | </ | ||
- | |||
- | < | ||
- | Call: | ||
- | glm(formula = admit ~ gre + gpa + rank, family = " | ||
- | data = mydata) | ||
- | |||
- | Deviance Residuals: | ||
- | Min | ||
- | -1.6268 | ||
- | |||
- | Coefficients: | ||
- | | ||
- | (Intercept) -3.989979 | ||
- | gre 0.002264 | ||
- | gpa 0.804038 | ||
- | rank2 | ||
- | rank3 | ||
- | rank4 | ||
- | --- | ||
- | Signif. codes: | ||
- | |||
- | (Dispersion parameter for binomial family taken to be 1) | ||
- | |||
- | Null deviance: 499.98 | ||
- | Residual deviance: 458.52 | ||
- | AIC: 470.52 | ||
- | |||
- | Number of Fisher Scoring iterations: 4 | ||
- | |||
- | > </ | ||
- | |||
- | < | ||
- | > confint(mylogit) | ||
- | Waiting for profiling to be done... | ||
- | 2.5 % 97.5 % | ||
- | (Intercept) -6.2716202334 -1.792547080 | ||
- | gre 0.0001375921 | ||
- | gpa 0.1602959439 | ||
- | rank2 | ||
- | rank3 | ||
- | rank4 | ||
- | > | ||
- | </ | ||
- | |||
- | < | ||
- | > confint.default(mylogit) | ||
- | 2.5 % 97.5 % | ||
- | (Intercept) -6.2242418514 -1.755716295 | ||
- | gre 0.0001202298 | ||
- | gpa 0.1536836760 | ||
- | rank2 | ||
- | rank3 | ||
- | rank4 | ||
- | </ | ||
- | |||
- | < |