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Range
Range
In the example in Table 11.1, the range of the distribution is 41, the difference between the high (93) and low (52) scores on the test. Range = highest score − lowest score
A small range indicates a concentrated distribution of scores, while a large range means that the scores are spread out and that some students have not done well on the test. This value gives us a rough idea of the variability of the test scores.

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