Statistics using technology textbook 2.2.3 homework problem 4

Complete 2.2.3 Homework Problem 4. Notice that the variable of interest is grades and the data set is called Firsttest. Use this information and the code on page 50, giving the plot an appropriate name. If you get an error like Error in of_density( . . .) : could not find function "gf_density" make sure you have the mosaic package by going to Tools > Install Packages > mosaic > Install, then running library(mosaic) in your console or Rmd file. Mark all of the following that are true. The most common grade was just below 80%. ) More People got As and Bs than Ds and Fs