Answer:
Step-by-step explanation:
The mean is basically the "average" that we are used to seeing. To get it, sum up all the numbers in your data set and divide the result by how many numbers there are. In your case, the sum would be:
88+72+68+78+94 = 400
Now, divide that result by the amount of numbers in the data set, which is 5.
400/5 = 80
That's your mean!