Logarithmic transformations: data set pollution.csv (variable definitions are in file pollution.txt) contains mortality rates and various environmental factors from 60 U.S. metropolitan areas [McDonald and Schwing, 1973]. For this exercise we shall model mortality rate given nitric oxides, sulfur dioxide, and hydrocarbons as inputs. This model is an extreme oversimplification as it combines all sources […]
Regression analysis is often used as a tool for causal inference. A typical application of regression analysis for casual inference will fit a model using the outcome as the response variable and the potential cause(s) as the predictor(s). Because of the inevitable confounding factors in a typical social science study, the regression model will inevitably […]
You are the owner of the Basket of Rye Corner Market, a small local convenience store that specializes in fresh bread but that also sells various sundries, including cigarettes and alcohol. You hire Tanisha, a clerk, to cashier and Ryan, a manager to run the store when you are not there. You are almost never […]
Write an email message delivering good news for a situation that you might encounter in your current work or your future career. Write an email message delivering bad news for a situation that you might encounter in your current work or your future career. For both messages, consider guidelines from the text for strengthening effectiveness […]
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