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unit
Data Displays and Numder Systems
| Question | Answer |
|---|---|
| Data | data is a collection of information gathered by observation, questioning or measurement. data is often organised in graphs or charts for analysis and may include facts, numbers or measurements. |
| Statistics | the collection, organisation, presentation, interpretation and analysis of data. a statistic is a single number, computed from a sample, that summarises some characteristic of a population. |
| Variability | he average of the squared differences from the mean in a data set. |
| Statistical question | A question that would answered by collecting and analyzing data. |
| Range | The difference between the maximum and the minimum in a data set. |
| Dot plot | a number line long enough to encompass all numbers in a sample, showing a dot over the position corresponding to each number. if more than one dot falls in the same position, they are stacked up. |
| Maximum | highest or greatest amount or value. |
| Distribution | the distribution of data typically takes into account the range and spread of a data set. it describes the shape of a data set when displayed on a histogram. |
| Mode | A type of average. in a set of scores, values or numbers the mode is the one that occurs the most. |
| Data landmark | A notable feature of a data set. Some landmarks are the mean, median , mode |
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