Measures of central tendencies show us where the middle of a set of data lies.
The three kinds of measures of central tendencies are:
Mean- The total sum of a set of data, divided by how many numbers are in the data set. When someone uses the term average, this is often what they are referring to.
Median- The number in the middle of an ordered data set.
Mode- The mode is the number that occurs most often in the data set.
Finding Mean
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Add all the numbers in the data set.
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Divide by the amount of numbers in the data set.
Finding Median
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Put all the numbers in the data set in order (can be from smallest to largest, or largest to smallest, it doesn’t matter).
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If there are an odd amount of numbers in the data set, use the number that is the one right in the middle of the data set.
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If there are an even amount of numbers in the data set, add the two middle digits, then divide by two to get the median.
Finding Mode
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It’s easier if you put the numbers in order.
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Look to see if there is one number that appears more than the rest of the data set.
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It is possible two numbers might appear and equal amount of times. If that is the case, then they are both the modes.
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Its is also possible that there is no one number that appears more than the rest. If that is the case, then the data set has no mode.