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- Week 7-8: Linear Regression Models
- Week 10: Logistic Regression Models
- Week 11: Introduction to Machine Learning
- Example questions for Section A.
Week 3 – Week 6: The students should know all R codes provided during Week 1-4. There might be some multiple-choice questions regarding R programming. Examples. • Which of the following methods make a vector of repeated values? • What would be the output of the following code? x <- 1:4 y <- 6:9 z <- x + y z Week 7-8: Linear Regression Models • Understand the concepts of correlation and regression. • Be able to fit linear models. Predict the dependent variable from the fitted model. • Understand the method of least squares. • Interpret regression coefficients. • Assumptions of Linear Regression • R Squared and Adjusted R Squared • F-test for model significance • t-test for parameter significance Week 10: Logistic Regression Models • Odds Ratio • Fitting Simple Logistic (Logit) Regression • Fitting Multiple Logistic (Logit) Regression • Provide interpretations for regression coefficients • Making predictions for new observations Week 11: Introduction to Machine Learning • Data partitioning • Making predictions and classifications. • Evaluation of the Logit Models based on Confusion Matrix (the formulas will be given): • Accuracy • Sensitivity • Specificity • Precision • Type I and Type II errors Example questions for Section A. • A significance test for comparing two means gave t stat =−1.97 with 10 degrees of freedom. Can you reject the null hypothesis that the µ’s are equal versus the two-sided alternative at the 5% significance level? 3 • What are the two types of variance which can occur in your data while conducting ANOVA? • If F stat follows an F distribution with df 1 =4 and df 2 =5, what is the value of F critical at a 1% significance level? • What is the output of the following code snippet? y <- c(1, “a”, TRUE) typeof(y) • What is the difference between matrix and data frame? • What is the difference between a vector and a list? • You want to find out whether “course” choice has any significant impact on the “earnings” of the WIUT “graduates”. How would you run ANOVA test for this dataset? • How do you create linear regression models in R? • How do you create logistic regression models in R? • How do run t-test in R? Download 295.73 Kb. Do'stlaringiz bilan baham: |
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