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Published byMarjorie Harris Modified over 8 years ago
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Median Median is the middle number in a data set when the data are arranged in numerical order. If you have an even number of data items, add the two middle numbers together and divide by 2
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How to find the median 1.Arrange the data set into numerical order from least to greatest. 2. Put a check under each number as you rewrite the numbers in order. 3. We need to find the number in the middle. Count the values and then circle the middle number.
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Median Example Example: 4,8,2,7,1 Arrange in numerical order: 1,2,4,7,8 The middle number is 4, so the median is 4. Example with an even number of data items: 10,4,8,2,7,1 Arrange in order: 1,2,4,7,8,10 Add the two middle numbers and divide by 2 4+7= 11, 11/2= 5.5, so the median is 5.5
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Mode Mode –is the number that appears most often in a data set. How to find the mode: 1.Arrange the data set into numerical order from least to greatest. 2. The number that appears most often in the mode. Example: 6,2,4,1,2,8= 1,2,2,6,4,8. the mode =2
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Mean = the Average Mean- the sum of the numbers in a data set divided by the number of entries in the set Example: 6,2,4,1,5,8 Add all the numbers: 6+2+4+1+5+6=24 Divide by 6, so 24/6=4 the mean is 4
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Range Range – is the difference between the greatest number and the least number is a set of data. Example: 4,7,1,9,6, Put the numbers in order from least to greatest. 1,4,6,7,9 then subtract the least number from the greatest. 9-1= 8 so the range is 8
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