Question

What is the mean of the data set? {21, 23, 25, 25, 26, 28, 28, 28, 31, 33}

Answer 1

Answer: 26.8

Explanation:

First, we add all the numbers together.

21 + 23 + 25 + 25 + 26 + 28 + 28 + 28 + 31 + 33 = 268

Now, we divide the sum by the amount of numbers we added. Since we added 10 numbers, we divide 268 by 10.

268/10 = 26.8

Answer 2

Mean = 26.8

Explanation:

In order to calculate the mean of a data set, we add up all the values in the data set and divide the sum by the number of values.

The formula for the mean is:

`\sf Mean = \frac{\textsf{Sum of all values}}{\textsf{Number of values}}`

In this case, the data set is:

{21, 23, 25, 25, 26, 28, 28, 28, 31, 33}

The sum of all the values in the data set is:

21 + 23 + 25 + 25 + 26 + 28 + 28 + 28 + 31 + 33 = 268.

The number of values in the data set is 10.

Substitute the given value in the above formula:

`\sf Mean = ( 268 )/( 10)\\\\ = 26.8`

Therefore, the mean of the data set is 26.8.