When I'm trying to determine which R technique to use, I start by mentally imagining the source data in an Excel spreadsheet. If there is one column that I'm particularly interested in, and that ...

We have discussed the basis of linear regression as fitting a straight line through a plot of data. However, there may be circumstances where the relationship between the variables is non-linear (i.e.

We can use R’s plot function to take a look at the answers people gave. The plot below shows the distribution of the ratings of Trump. Round numbers and increments of 5 typically received more ...

Here, I have had to manually create a temporary AirEntrainDummy variable in order to get the regression line to plot correctly. But you can see the basic idea: Each measure of concrete strength falls ...

Linear regression is utilized to examine significant warming and cooling trends through each 30 yr period. Graphical plotting methods indicate a linear warming trend from 1901–1930, and 1911–1940, a ...