Although the proportion of confidence intervals goes up substantially, it is still lower that 0.95. In the next chapter, we learn the reason for this. To motivate this, make a plot of the error, the...

Although the proportion of confidence intervals goes up substantially, it is still lower that 0.95. In the next chapter, we learn the reason for this. To motivate this, make a plot of the error, the difference between each poll’s estimate and the actual d = 0.021. Stratify by pollster.

For these exercises, we will use actual polls from the 2016 election. You can load the data from the dslabs package.