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Explanation & Answer
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Range= To find the range first order the data from least to greatest. Then subtract the smallest value from the largest value in the set.
-1 0 1 1 1 4 = 4- -1=
Range = 3
variance= work out the mean, then for each number, subtract the mean and square the result.Then work out the average of those squared differences.
the mean in this case is = 1
-4 +-2 +0 +0 +0 +9= 3
variance = 0.5
standard deviation= 1.73
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