Range- the difference between the largest and smallest number in a group of numbers. Mean- the average of a set of numbers. To find the mean, add the numbers to find the sum. Then divide the sum by the number of numbers in the data. Median- the middle number in a set of numbers ordered from least to greatest. Mode- the most often used number in a set of numbers. Not all sets of numbers have a mode. EXAMPLES: The examples below shows how to find the range, mean, median, and mode for a set of numbers. Set of Numbers: 3, 6, 1, 6, 9 Always order the numbers from least to greatest to help you keep your work organized & accurate! Set of Numbers (This time they are ordered from least to greatest): 1,3,6,6,9 Range: Find the difference between the smallest & largest number. 9-1=8 The range is 8. Mean: the average. First find the sum, then divide. Step 1 for finding the mean: 1 + 3 + 6 + 6 + 9= 25 Step 2 for finding the mean: 25 divided by 5= 5 The mean is 5. Median: the middle number 1, 3, 6, 6, 9 The median in this set of numbers is 6. Mode: most often number used. 1,3,6,6,9 The mode is 6 because it is used two times in this set of numbers.
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