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| statistics used to describe the basic features of the data in a study. |
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| Tools used to analyze data; includes mean, median, and mode. |
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| Notation denoting the sum of a set of data. |
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| Variable used to represent the individual data values. |
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| variable used to represent the number of data values in a sample. |
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| Variable used to represent the number of data values in a population |
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| Pronounced "x-bar"; it denotes the mean of a set of sample values |
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| Also known as an Average; relatively reliable but one extreme value can affect it dramatically |
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| Pronounced "mu"; denotes the mean of all values in a population. |
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| pronounced "x-tilde"; variable used to denote the median (middle value when data is arranged from least to greatest). |
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| a data set where there are two modes(value or values that occur most often) |
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| data set where there are more than two modes(value or values that occur most often) |
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| The value midway between the maximum and minimum values in a data set. It is calculated by dividing the difference of the maximum and minimum by 2. Sensitive to extremes. |
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| A measure of center where data values are assigned different weights. |
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| Measures used to describe the distribution, or spread, of data. |
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| A measure of variation that is the difference between the maximum and minimum values. |
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| A measure of variation that is used to quantify the amount of variation of a set of data values; denoted by "s". |
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| Measures of Relative Standing |
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| Numbers that show the location of data values relative to other values within a data set. |
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| The number of standard deviations that a given value x is above or below the mean. |
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| measures of location that divide the data into 100 groups with 1% in each group. |
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Divides ranked scores into 4 equal parts:[image]-first quartile separates the bottom 25% from top 75%;
[image]-second quartile (aka median) separates bottom 50% from the to 50%;
[image]-third quartile separates the bottom 75% from the top 25%. |
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Summary that Includes: 1. Minimum Value 2. 1st Quartile 3. 2nd Quartile or Median 4. 3rd Quartile 5. Maximum Value |
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