| A | B |
|---|
| descriptive statistics | Methods used to summarize the characteristics of data |
| inferential statistics | methods using sample data to make generalizations about a population |
| frequency table | List of categories of values along with their corresponding frequencies |
| histogram | Bar graph representing the frequency distribution of a data set |
| polygon | A line graph representing the frequency distribution of a data set |
| ogive | A polygon representation of a cumulative frequency table |
| stem-and-leaf plot | Method of sorting and arranging data to reveal its shape |
| pareto chart | Bar graph for qualitative data |
| mean | The sum of a set of values divided by the count of the values |
| median | The middle value of a set of values in ascending order |
| mode | The value that occurs most frequently |
| bimodal | Having two modes |
| midrange | One-half the sum of the highest and lowest values |
| skewed | Not symmetric and extending more to one side than the other |
| symmetric | Data with two halves that are approximate mirror images |
| range | The difference between the highest and lowest values |
| standard deviation | A measure of dispersion equal to the square root of the variation |
| variance | A measure of dispersion equal to the square of the standard deviation |
| range rule of thumb | standard deviation is approx. range/4 |
| empirical rule | Using the standard deviation to get information about data with a bell-shaped distribution |
| Chebyshev's theorem | Using the standard deviation to get information about data from any shaped distribution |
| z-score | Number of standard deviations that a given value is above/below the mean |
| quartiles | The three values that divide ranked data into four groups |
| percentiles | The 99 values that dvide ranked data into 100 groups |
| outlier | Extreme values |
| 5-number summary | Minimum value, Q1, median, Q3, and maximum value |
| boxplot | Graphical representation of the 5-number summary |
