Question

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

Answer 1

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.

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

3. 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**.