It looks like this: Given the scores 7, 9, 7, 7, 9, 7, 7, 6, 6:
| Score | f |
|---|---|
| 9 | 2 |
| 8 | 0 |
| 7 | 5 |
| 6 | 2 |
You can also represent this as a bar graph where the scores are the x axis labels and the frequency is the y axis.
Definitions
Frequency
A [frequency] is [the number of times a score occurs in a set of data]. It is represented by the symbol [f].
Histogram
A histogram is like a bar chart but [the adjacent bars touch].
Frequency Polygon
A frequency polygon is a [histogram-like line chart with a dot for each entry]. Its used when there is too much data for a histogram. These dots are called [data points||don’t over think it].
Grouped distribution
Its a technique for making a histogram managable for larger data sets. To do it, you [group numbers and record the occurence for the group, like “the 0-4 group”].
Relative frequency
The proportion of time a score occurs in a distribution. The formula is [].