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What is the mean of the following data set?

{13, 18, 13, 14, 13, 16, 14, 21, 13}

(1 point)

13

14

15

13.5

1 answer

To find the mean of the data set {13, 18, 13, 14, 13, 16, 14, 21, 13}, you need to sum all the values and then divide by the number of values.

  1. Sum the values:
    13 + 18 + 13 + 14 + 13 + 16 + 14 + 21 + 13 = 13 + 18 = 31
    31 + 13 = 44
    44 + 14 = 58
    58 + 13 = 71
    71 + 16 = 87
    87 + 14 = 101
    101 + 21 = 122
    122 + 13 = 135

So, the total sum is 135.

  1. Count the number of values in the data set:
    There are 9 values.

  2. Divide the sum by the number of values to get the mean:
    Mean = Sum / Number of values
    Mean = 135 / 9 = 15

Therefore, the mean of the data set is 15.