reg_models01

John's Hopkins University Regression Models on Coursera

Logan J Travis 2014-07-27

Overview

Course project for Regression Models class by John's Hopkins University on Coursera. Analyzes the [mtcars][mtcars_doc] data (included in the the base version of R) using statistacl regression models.

Assignment Text

You work for Motor Trend, a magazine about the automobile industry. Looking at a data set of a collection of cars, they are interested in exploring the relationship between a set of variables and miles per gallon (MPG) (outcome). They are particularly interested in the following two questions:

• “Is an automatic or manual transmission better for MPG”
• "Quantify the MPG difference between automatic and manual transmissions" Question

Take the [mtcars][mtcars_doc] data set and write up an analysis to answer their question using regression models and exploratory data analyses.

Your report must be:

• Written as a PDF printout of a compiled (using knitr) R markdown document.
• Do not use any packages that are not in R-base or the library datasets.
• Brief. Roughly the equivalent of 2 pages or less for the main text. Supporting figures in an appendix can be included up to 5 total pages including the 2 for the main report. The appendix can only include figures.
• Include a first paragraph executive summary.

Files

./explore/

• mtcarsPlotEx01.r creates a box plot of MPG by transmission type
• mtcarsPlotEx02.r creates a scatter plot with linear model line of MPG by transmission type (automatic = 0 and manual = 1)
• mtcarsPlotEx03.r creates a scatter plot with linear model line of MPG by weight (in 1000 lbs) grouped by transmission type

./shiny_app

./slidify_presentation

Links