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Three measures of central tendency are the mode, the median and the mean. The mean can only be used with interval/ratio level data. Measures of variability are numbers that describe how much variation or diversity there is in a distribution.
The comparison between the measures of central tendency and measures of variability is given below:
The measure of a central tendency refers to the central value for a probability distribution. The three common measures of central tendency that are used include:
- Mean: Mean is the sum of all the numbers divided by the total numbers of the values.
- Median: Median refers to the number in the middle in an ordered list.
- Mode: Mode refers to the number that occurs most.
The measure of variability in statistics include the following:
- Range: This is the difference between the highest number and the lowest number.
- Standard deviation: This is the average distance from the mean.
- Interquartile range: This is the range of the middle half of the distribution.
- Variance: This is the average of the squared distance from the mean.
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