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Statistics
| Term | Definition |
|---|---|
| Median | A measure of center. It's the middle data value. To find, order values from least to greatest them find the middle value. |
| Mode | A measure of center. It's the value that occurs most often. A data set can have one mode, no mode, or more than one mode |
| Range | Is a measure of variability. Describesa how the values in a data set vary with a single number. Difference of the greatest value and least value |
| Inner Quartile Range | Is a measure of variability. It represents the difference between the first quartile and the third quartile. |
| Outlier | A data point the varies significantly from the rest of the data. Will be a value that is either significantly larger or smaller than other numbers. |
| Skewed-Left | If the distribution has a long tail extending to the left, it is ... |
| Skewed-Right | If the distribution has a long tail extending to the right it is ... |
| Symmetrical | The shape perfectly symmetric, because it can be divided into two halves (a laft half and a right half) that are mirror images of each other. Do not have to be perfect. |
| Bi-Model | If the distribution has two modes (or humps) |
| Uniform | If the distribution of data is all the same or flat. Have no mode and is perfect. |
| Mean | A measure of center also a average of the data. To find, add all of the data points then divide by the number of data points. |
| Mean Absolute Deviation | One way to describe variability, or how spread out a set of data is. Is the average distance that the data points in a set of data are from the mean. |
| Sample Size | Describes the number of data points collected in the smaple |
| Quartile 1 | The first value the divide a data set into four equal part. This is the median of the first half |
| Quartile 3 | The third value that divides a data set into four equal parts. This is the median of the last half |
| Probability | The liklihood that an event will happen. |
| Impossible | Events that will never happen (0) |
| Certain | Events that will definitely happen. (1) |
| Equally Probable/Equally Likely | Equally to occur or not to occur. Is exactly between impossible and cetain |
| Unlikely | These events are closer to impossible and fall between 0 & 1/2 |
| Likely | These events are closer to certain and fall between 1/2 & 1 |
| Complement | Opposite of the statistical event. Includes all the outcomes that are not part of the original event. |
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