| A | B |
|---|
| categorical frequency distribution | a frequency distribution used when the data are categorical (nominal) |
| class boundaries | the upper and lower values of a class for a grouped frequency distribution whose values have one additional decimal place more than the data and end in the digit 5 |
| class midpoint | a value for a class in a frequency distribution obtained by adding the lower and upper class boundaries for the lower and upper class limits) and dividing by 2 |
| class width | the difference between the upper class boundary and the lower class boundary for a class in a frequency distribution |
| cumulative frequency | the sum of the frequencies accumulated up to the upper boundary of a class in a frequency distribution |
| frequency | the number of values in a specific class of a frequency distribution |
| frequency distribution | an organization of raw data in table form, using classes and frequencies |
| frequency polygon | a graph that displays the data by using lines that connect points plotted for the frequencies at the midpoints of the classes |
| grouped frequency distribution | a distribution used when the range is large and classes of several units in width are needed |
| histogram | a graph that displays the data by using vertical bars of various heights to represent the frequencies of a distribution |
| lower class limit | the lower value of a class in a frequency distribution that has the same decimal place value as the data |
| ogive | a graph that represents the cumulative frequencies for the classes in a frequency distribution |
| open-ended distribution | a frequency distribution that has no specific beginning value or no specific ending value |
| Pareto chart | chart that uses vertical bars to represent frequencies for a categorical variable |
| pie graph | a circle that is divided into sections or wedges according to the percentage of freqtuencies in each category of the distribution |
| raw data | data collected in orginal form |
| relative frequency graph | a graph using proportions instead of raw data as frequencies |
| stem and leaf plot | a data plot that uses part of a data value as the stem and part of the data values as the leaf to form groups or classes |
| time series graph | a graph that represents data that occur over a specific time |
| ungrouped frequency distribution | a distribution that uses individual data and has a small range of data |
| upper class limit | the upper value of a class in a freqency distribution that has the same decimal place value as the data |
| f | frequency ofthe class |
| n | total number of values |
| R | highest value-lowest value |
| class width | upper boundary-lower boundary |
| Xm | adding the upper and lower boundaries and dividing by 2 or adding the lower and upper limits and dividing by 2: lower boundary +upper boundary/2 or lower limit + upper limit/2 |
| Degrees | f/n times 360 degrees |
