Stemplots, Histograms, and Boxplots

The data used in these example are the scores of twenty subjects on a psychological test. The R commands in the following display define a data ``column'' and make a stemplot. Click the Submit button to see the results. You can edit the text field to use your own data; the Reset button restores the original example.

psych <- c(91, 64, 98, 66, 83, 87, 83, 86, 80, 93, 83, 75, 72, 79, 90, 80, 90, 71, 84, 68) stem(psych)

The result should look like this:

  The decimal point is 1 digit(s) to the right of the |

  6 | 468
  7 | 1259
  8 | 00333467
  9 | 00138

The hist command creates a histogram; the boxplot command creates a boxplot. Try submitting the following commands to Rweb to get a histogram and a boxplot of the psychological test scores:

psych <- c(91, 64, 98, 66, 83, 87, 83, 86, 80, 93, 83, 75, 72, 79, 90, 80, 90, 71, 84, 68) hist(psych) boxplot(psych)

Try some examples of your own in the work area below.

Work Area

Enter your own commands here; then click the Submit button.