Exam 2: Basic Descriptive Statistics Percentages, Ratios Rates, Tables, Charts Graphs

A researcher wants to visually display the U.S. divorce rate (an interval-ratio level variable) for the last 50 years. An appropriate format would be

Twenty-three of the 50 states rejected a proposed constitutional amendment to make the house fly the National Insect. What percentage is this?

A line chart or frequency polygon is based on

-In Table 1, what proportion of cases are 18-23?

For a single variable measured at the nominal level, an appropriate graph would be a

Pie charts show the frequency distribution of

The midpoints of intervals for frequency distributions constructed with interval-ratio variables are found by

To be converted to a percentage, the proportion must be multiplied by