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Measures of Center (Guided Notes) Mean is also sometimes called First, calculate the Second, determine Finally, Divide the Median is the . or by of all numbers numbers there are to calculate mean value First, the numbers from to Second, or both the lowest and highest value in the set Continue Step 2 until there are either one or two numbers remaining o If there is one number remaining, the remaining number is the o If there are two numbers remaining then the numbers and divide by to calculate the median Mode is the value that appears the First order the numbers from smallest to largest Count the number of of each value The is the value that occurs the most as long as it occurs than It is possible for a data set to have Range is a measure of spread It is calculated by subtracting the the number. number from