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unit 1
Data Displays and Number Systems
| Term | Definition |
|---|---|
| Data | Information that is gathered by counting, measuring, questioning, or observing. |
| Statistics | The study of numerical data: collecting, organizing, and analyzing data to interpret it and answer questions. |
| Variability | How spread out the values in a set of data are. |
| Statistical question | A question that would be answered by collecting or analyzing data. |
| Range | The difference between the maximum and the minimum in a data set. the range is a measure of how spread out a distribution is. |
| 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, maximum, minimum, and range. |
| minimum | lowest or least amount or value. |
| median | a type of average which is the middle value of an ordered set of data val 2. a line that joins the vertex of a triangle to the midpoint of the opposite side. |
| average | An average is a measure used to find the location of the middle (central tendency) of a data set. Mean, median and mode are all types of averages. Often the word average refers to the mean. |
| mean | usually called the average and may be called the arithmetic mean. the mean is the total of all the scores or amounts, divided by, how many scores or amounts there were. |
| balance point | for data the balance point is the mean |
| measure of center | measures that describe a data set by identifying the 'central' or middlemost value by a single number. • usually described as averages, the most common types being mean, median and mode. |
| outlier | value far away from most of the rest in a set of data. |
| histogram | a graph using bars to represent frequency distribution where, bar heights represent the score frequencies and there are no spaces between the bars. |
| bin | a interval for collecting, aggregating, organizing, or graphing data |
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