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Year 8 Data
Definitions and Facts from the NSW Year 8 DataTopic
| Term | Definition |
|---|---|
| bias | something unwanted that causes a sample to not truly represent the population |
| categorical data | non-numerical data that can be classified into categories (e.g people’s eye colour, or their favourite rugby team) |
| data | a collection of facts or raw information |
| dot plot | a special column graph of dots for a small set of numerical data |
| frequency | how often a score appears in a data set |
| frequency histogram | a special column graph that shows the frequencies of numerical data |
| frequency polygon | a special line graph that shows the frequencies of numerical data |
| quantitative data | numerical data that can be measured or counted (e.g peoples height or the number of pets they own) |
| Stem-and-leaf plot | a ‘sideways column graph that lists the numerical data in order |
| analyse | to examine something carefully by breaking it down into its parts or features |
| data set | a collection of data or scores about the same subject |
| mean | the average value of a data set, found by dividing the sum of scores by the number of scores |
| measure of location | a general name for the average, middle or typical value of a data set (e.g the mean, median or mode) |
| median | the middle score of a data set when the scores are arranged in order |
| mode | the most common score or scores of a data set |
| range | the difference between the highest score and lowest score in a data set |
| scatter diagram | a diagram of dots on a number plane that illustrates a relationship between the variables |
Created by:
wdobson
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