University of Minnesota, Twin Cities School of Statistics Stat 3011

The grade distributions are shown as stem and leaf plots like the one
below. At the top there is a brief summary (from the R `summary`

command)

Min. 1st Qu. Median Mean 3rd Qu. Max. 33.00 68.50 88.00 80.67 97.00 100.00showing the lowest score, first quartile, median, mean, third quartile, and highest score. The distribution follows (produced by the R

`stem`

command)
3 | 36 4 | 9 5 | 12348 6 | 889 7 | 055788 8 | 4789 9 | 235555577 10 | 000000000To the left of the vertical bar are the leading digits of the grades. To the right of the vertical bar are the last digits of the grades. Each single digit on the right represents one grade.

The bottom line says there were nine perfect scores (100). The next to bottom line says there were two 97s, five 95s, one 93, one 92. And so forth.