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Definition
| The numerical average of a set of numbers. |
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Term
| Measures of Central Tendency |
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Definition
| Different measurements of a data set and how it is spread. |
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Definition
| The middle value of a set of data. |
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Definition
| The value (or values) that appear most often in a set of data. |
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Definition
| A measurement that describes how widely varied that data values in a set are from each other. |
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Definition
| A measure of variation that is found by taking the largest number and subtracting the smallest number. |
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Definition
| The median of the lower set of data after first dividing the total set by the median. |
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Definition
| The median of the upper set of data after first dividing the total set by the median. |
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Definition
| An extremely high or low value when compared to the other data in the set. |
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Definition
| A table or chart that marks, using tally marks, the number of times something occurs. |
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Term
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Definition
| Data representations using bars of certain lengths determined by their frequency. Histograms have no spaces between the bars. Bar Graphs have spaces. |
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Term
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Definition
| Measure of a characteristic of a sample. |
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Term
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Definition
| The average of the absolute values of the differences between the mean and each value in the data set. |
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Term
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Definition
| A measurement of the data that describes how close to the mean the data tend to be. A low standard deviation means the data is close to the mean. A high standard deviation means the data is far from the mean. |
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Term
| Negatively Skewed Distribution |
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Definition
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Term
| Positively Skewed Distribution |
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Definition
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Term
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Definition
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Term
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Definition
| A table used to show the frequencies of data from a survey that is classified according to two categories. |
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Term
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Definition
| Ratio of the number of observations to the total. Can be calculated using a two-way table. |
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Term
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Definition
| A sampling method meant to insure that a sample is without bias. |
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Term
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Definition
| A sampling error that leads to one choice being preferred over another. |
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Definition
| A sample that is determined by a predetermined system of choice. |
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Definition
| A sample that is chosen by convenience to the statistical team. |
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Term
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Definition
| A sample that is taken only AFTER the population is divided into sub-groups. |
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Term
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Definition
| The group of people or objects from which a sample is chosen. |
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