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Unit 3 Part 4 Vocab

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Definition
Term
find the sum (+) of the data values and then divide (รท) by the number of values in the data set (a measure of center)   mean  
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the middle number in an ordered data set (if two numbers are in the middle find the mean of those two numbers) (a measure of center)   median  
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the item(s) in a data set that occurs most frequently; there can be one, more than one, or none (a measure of center)   mode  
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the difference (-) between the greatest and least values in a data set (a measure of variability)   range  
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the greatest number in a data set   maximum  
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the least number in a data set   minimum  
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a statistical graph that shows the distribution of a data set using a five-number summary along a number line   box-and-whisker plot  
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four parts of a data set with the same number of data values in each part; 25% (or one-fourth) of a data set   quartile  
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the distance between the first and third quartiles of the data set; shows the spread of the middle 50% of the data values (a measure of variability)   interquartile range  
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