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Statistics
Vocabulary for Statistics Unit Grade 7
| Term | Definition |
|---|---|
| Absolute Deviation | The distance a number is from a given point. |
| Biased Sampling | A sampling that is not representative of a population because one or more parts of the population are favored over others. |
| Box Plot | A data display that shows the distribution of a set of data in four quartiles. |
| Dot Plot | A data display that not only shows the distribution or spread of data, but also shows the frequency of the data values. |
| Frequency | A term used to describe how often something happens or appears. |
| Inference | An implied conclusion about something. |
| Interquartile Range | The difference between the upper and lower quartiles of a set of data. |
| Lower Quartile | The median of the lower half of a data set; also called the first quartile. |
| Lower Extreme | The lowest value in a data set; also called the minimum. |
| Mean Absolute Deviation | The average distance that data points are from the mean of a data set. |
| Measures of Center | The measures of the average or typical value of a data set. |
| Measures of Variability | The measures of the distribution or spread of a data set. |
| Mean | A measure of center that is found by taking the sum of all the data and dividing it by the number of values in the set of data. |
| Median | The middle value of a set of data when the values are in numerical order. |
| Mode | The most repeated value or values in a set of data. |
| Outlier | A data value that is extremely "far off" from the majority of the data. |
| Population | An entire group of people or objects. |
| Random Sampling | A sampling where each member of the population is equally likely to be selected. |
| Range | The difference between the highest and lowest values in a data set. |
| Sample | A part of a population. |
| Upper Extreme | The highest value in a data set; also called the maximum. |
| Upper Quartile | The median of the upper half of a data set; also called the third quartile. |