The conversation between human and AI assistant.
[|Human|] Compute the mean of the following data points: 3, 5, 7, 9.
[|AI|] The mean (average) is calculated by adding together all the data points (3 + 5 + 7 + 9 = 24) and then dividing by the total number of data points (4).

So the mean of the data points 3, 5, 7, 9 is calculated as follows: 24/4 = 6.
[|Human|] 
Compute the mean of the following data points: 3, 5, 7, 9.