Large gaps between stems containing leaves, especially at the top or bottom, suggest the existence of
By looking at the stem-and-leaf display "sideways", we can see the ? of the data.
Shows data measurements in chronological order. Data are plotted in order of occurrence at regular intervals over a period of time.
Used for qualitative data Wedges of the circle represent proportions of the data that share a common characteristic. "Good practice" requires including a title and either wedge labels or legend.
A bar chart with two specific features: Heights of bars represent frequencies. Bars are vertical and are ordered from tallest to shortest.
Used for qualitative or quantitative data. Can be vertical or horizontal. Bars are uniformly spaced and have equal widths. Length/height of bars indicate counts or percentages of the variable. "Good practice" requires including titles and units and labeling axes.
Data values that are very different from other values in the data set. may indicate data recording errors
Graphical summary of a frequency table. Find the class limits. The lower limit of the "leftmost" class is set equal to the smallest value in the data set.