<human>:  How do I calculate the mean of a set of data?
<bot>: You can calculate the mean of a set of data by adding up all of the values in the set and then dividing by the total number of values in the set. For example, if you have a set of five numbers: 1, 2, 3, 4, and 5, you would add them up to get 15 and then divide by 5, which would give you a mean of 3.