ggplot2 Continued

In Lec05.R we study new geom_'s:

• geom_histogram
• geom_line(). In particular the group aesthetic
• geom_bar(). In particular:
  • Understanding stat=identity vs stat=bin
  • and position adjustments

In 1973, the UC Berkeley was sued for bias against women who had applied for admission to graduate schools. n=4526 applicants:

Source: local data frame [4 x 3]
Groups: Admit [?]

     Admit Gender  Freq
    (fctr) (fctr) (dbl)
1 Admitted   Male  1198
2 Admitted Female   557
3 Rejected   Male  1493
4 Rejected Female  1278

However, there was another variable researchers could consider: Dept applied to.

Source: local data frame [24 x 4]

      Admit Gender   Dept  Freq
     (fctr) (fctr) (fctr) (dbl)
1  Admitted   Male      A   512
2  Rejected   Male      A   313
3  Admitted Female      A    89
4  Rejected Female      A    19
5  Admitted   Male      B   353
6  Rejected   Male      B   207
7  Admitted Female      B    17
8  Rejected Female      B     8
9  Admitted   Male      C   120
10 Rejected   Male      C   205
..      ...    ...    ...   ...

Investigate:

1. How male vs female acceptance varied by department.
2. The “competitiveness” of different departments as measured by acceptance rate.