Answers − Range of a set of data

1.

Find the range of    10    11    11    9    14

		(a)   Order the numbers
		9, 10, 11, 11, 14
		(b)   Find the range
		Range = Highest − Lowest
		Range = 14 − 9 = 5

2.

Find the range of    8    3    12    5    12

		(a)   Order the numbers
		3, 5, 8, 12, 12
		(b)   Find the range
		Range = Highest − Lowest
		Range = 12 − 3 = 9

3.

Find the range of    28    19    9    19    23    24    11

		(a)   Order the numbers
		9, 11, 19, 19, 23, 24, 28
		(b)   Find the range
		Range = Highest − Lowest
		Range = 28 − 9 = 19

4.

Find the range of    4    15    2    20    6    3    6

		(a)   Order the numbers
		2, 3, 4, 6, 6, 15, 20
		(b)   Find the range
		Range = Highest − Lowest
		Range = 20 − 2 = 18

5.

Find the range of    18    19    24    25    21    18    22

		(a)   Order the numbers
		18, 18, 19, 21, 22, 24, 25
		(b)   Find the range
		Range = Highest − Lowest
		Range = 25 − 18 = 7

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