# Help with question on Iowa practice test gr 7? :)

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Which set of numbers shows the least variability?

A. {2,4,6,10}

B. {2,3,5,7}

C. {3,9,18,27}

D. {3,7,8,16}

Does this mean difference between largest and smallest number in set?

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Variability can mean the range (difference between the largest & smallest).

I would definitely go with C.

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I would have pick B
Variability is how spread out the data points are. So B has the numbers most closely packed together.

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B. I think RootAnn missed the word "least", but thanks for that link. Good explanation.

Because?

*numbers are closest together

*the difference between largest and smalles numbers in set is the smallest

both apply to B.

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Ha! I did miss the word "least." I read it as "most." :blushing:  I'll leave my error to remind me to be more humble.  :angelsad2:

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