Answer:
The mean of a set of n numbers is the sum of the numbers divided by n. Example: Compute the mean of the following set of numbers: 25, 35, 55, 75, 80. (25 + 35 + 55 + 75 + 80) / 5 = 54/5 = 10.8.
The median is the middle measurement when items are arranged in order of size. Example: Determine the median of the following set of numbers: 25, 55, 80, 35, 75. Arrange the numbers in order of size: 25, 35, 55, 75, and 80. The middle number, or mean is 55.
The mode is the number that occurs most often in a group of numbers. Example: Determine the mode of the following set of numbers: 25, 55, 70, 24, 70. The number 70 occurs more frequently than the other numbers. Therefore, 70 is the mode.
The range is the greatest number minus the least number in a group of numbers. Example: Determine the range of the following set of numbers: 25, 55, 65, 80. To compute the range, subtract the least number, 25, from the greatest number, 80. 80-25 = 55.
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