Exercise

Exercise 10 - Filter Error Plot

Some of these states only have a few polls. Repeat the previous exercise to plot the errors for each state, but only include states with five good polls or more.

Instructions

100 XP

Use the filter function to filter the data for polls with grades equal to A+, A, A-, or B+.
Group the filtered data by state using group_by.
Use the filter function to filter the data for states with at least 5 polls. Then, use ungroup so that polls are no longer grouped by state.
Use the reorder function to order the state data by error.
Using ggplot, set the aesthetic with state as the x-variable and error as the y-variable.
Use geom_boxplot to indicate that we want to plot a boxplot.
Use geom_point to add data points as a layer.