UPSKILL MATH PLUS

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1. Which of the following is not a measure of dispersion?
 
2. The range of the data \(8, 8, 8, 8, 8, … 8\) is .
 
3. The sum of all deviations of the data from its mean is
 
4. The mean of \(100\) observations is \(40\) and their standard deviation is \(3\). The sum of squares of all deviation is