What is the mean for 9 9 7 9 6 7 9 8 8 8?

To find the mean, add all the numbers together and then divide by the count of the numbers. For the dataset 9, 9, 7, 9, 6, 7, 9, 8, 8, 8, the sum is 80. There are 10 numbers, so the mean is 80 divided by 10, which equals 8.