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Measures of central tendency — A form of estimation of a mid-point/average in a set of data.
Mean — The average that is shown by all scores in the data set when they are divided by n.
Median — The mid-point in a set of data that has been placed in order.
Mode — The most common value within a set of data.
Measures of dispersion — A measure that shows the spread of data, whether it is tightly clustered or has a broader spread.
Range — A value which shows the spread of data, representing the difference between the lowest and highest scores.
Standard deviation — A value which represents the amount of variation of results from the mean score.