PPT-Does your logistic regression model suck?

PERFECTION This is bad Model Convergence Status Quasicomplete separation of data points detected Warning The maximum likelihood estimate may not exist   Warning The LOGISTIC procedure continues in spite of the above warning Results shown are based on the last maximum likelihood iteration Validity of the model fit is questionable. SPSS. Karl L. Wuensch. Dept of Psychology. East Carolina University. Download the Instructional Document. http://core.ecu.edu/psyc/wuenschk/SPSS/SPSS-MV.htm. .. Click on Binary Logistic Regression .. Machine Learning 726. Classification: Linear Models. Parent. Node/. Child Node. Discrete. Continuous. Discrete. Maximum Likelihood. Decision Trees. logit. distribution. (logistic. regression. ). Classifiers:. itation. Feb. 5, 2015. Outline. Linear regression. Regression: predicting a continuous value. Logistic regression. Classification: predicting a discrete value. Gradient descent. Very general optimization technique. William Cohen. 1. SGD for Logistic Regression. 2. SGD for . Logistic regression. Start with . Rocchio. -like linear classifier:. Replace sign(. .... ) with something differentiable: . Also scale from 0-1 not -1 to +1. . Logistic Regression III. Diagnostics and Model Selection. 2. Outline. • . Checking model assumptions. - outlying and influential points. - linearity. • . Checking model adequacy . . - Hosmer- Lemeshow test. PERFECTION!. This is bad. Model Convergence Status. Quasi-complete separation of data points detected.. Warning:. The maximum likelihood estimate may not exist..  . Warning:. The LOGISTIC procedure continues in spite of the above warning. Results shown are based on the last maximum likelihood iteration. Validity of the model fit is questionable.. Comments on problem set. Sigmoidal growth curve. “Logistic Model” equation. Population dynamics. Management applications. Logistic growth. :. growth with limits. Because growth . is . typically . Lecture 4. September 12, 2016. School of Computer Science. Readings:. Murphy Ch. . 8.1-3, . 8.6. Elken (2014) Notes. 10-601 Introduction to Machine Learning. Slides:. Courtesy William Cohen. Reminders. Weifeng Li and . Hsinchun. Chen. Credits: Hui Zou, University of Minnesota. Trevor Hastie, Stanford University. Robert . Tibshirani. , Stanford University. 1. Outline. Logistic Regression. Why Logistic Regression?. Dan Jurafsky. Stanford University . Logistic Regression. Logistic Regression. Important analytic tool in natural and social sciences. Baseline supervised machine learning tool for classification. Is also the foundation of a neural network. Machine Learning. Classification. Email: Spam / Not Spam?. Online Transactions: Fraudulent (Yes / No)?. Tumor: Malignant / Benign ?. 0: “Negative Class” (e.g., benign tumor). . 1: “Positive Class” (e.g., malignant tumor). In WLS, you . are simply treating each observation as more or less informative about the underlying relationship between X and Y. Those points that are more informative are given more 'weight', and those that are less informative are given less weight. 2. Dr. Alok Kumar. Logistic regression applications. Dr. Alok Kumar. 3. When is logistic regression suitable. Dr. Alok Kumar. 4. Question. Which of the following sentences are . TRUE.  about . Logistic Regression. in Predictive Analytics Applications. CAIR Conference XLIII ● November 14 – 16, 2018, Anaheim, CA. John Stanley, Director of Institutional Research. Christi Palacat, Undergraduate Research Assistant.