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Problem-Solving and Data Analysis / One-variable data: Distributions and measures of center and spread Difficulty: Medium

$A list consists of 5 numbers: 2, 10, 3, 7, 6$

The mean of the list of numbers above is what fraction of the sum of the five numbers?

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74

Explanation

The correct answer is $one fifth$ . The mean of the list of numbers is found by dividing the sum of the numbers by the number of values in the list. Since there are 5 numbers in the list, the mean is $one fifth$ of the sum of the numbers. Note that 1/5 and .2 are examples of ways to enter a correct answer.