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Statistics Chapter 1 Review

### Large gaps between stems containing leaves, especially at the top or bottom, suggest the existence of

outliers

### By looking at the stem-and-leaf display "sideways", we can see the ? of the data.

Distribution shape

### Shows data measurements in chronological order. Data are plotted in order of occurrence at regular intervals over a period of time.

Time Series

### 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.

Pie Chart

### A bar chart with two specific features: Heights of bars represent frequencies. Bars are vertical and are ordered from tallest to shortest.

Pareto Chart

### 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.

Bar Graphs

### Data values that are very different from other values in the data set. may indicate data recording errors

Outliers

### 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.

Histogram