To calculate the deviation of a data point from the mean, you subtract the mean from the data point. In your case, you provided:
- Mean = 9
- Data point = 6
The deviation can be calculated as follows:
\[ \text{Deviation} = \text{Data point} - \text{Mean} \]
Substituting the values you have:
\[ \text{Deviation} = 6 - 9 = -3 \]
So, the deviation of the data point (6) from the mean (9) is -3. This indicates that the data point is 3 units below the mean.