What is the mean in this data set?

5, 7, 11, 11, 6

The mean in this data set is 8.0.

To calculate the mean, add all the numbers together: 5 + 7 + 11 + 11 + 6 = 40.
Then divide the total by the number of numbers in the data set: 40 / 5 = 8.0.

Therefore, the mean of this data set is 8.0.