Question
Consider the statistics of two sets of observations as follows :
If the variance of the combined set of these two observations is ${{17} \over 9}$, then the value of n is equal to ___________.
| Size | Mean | Variance | |
|---|---|---|---|
| Observation I | 10 | 2 | 2 |
| Observation II | n | 3 | 1 |
If the variance of the combined set of these two observations is ${{17} \over 9}$, then the value of n is equal to ___________.
Correct Answer
5