The mean of 5 observations is 5 and variance is 4. If three of the five observations are 5, 2 and 8, then the other two observations are:
A. 5, 5
B. 4, 6
C. 3, 7
D. 8, 2
Answer:B
The mean of 5 observations is 5 and variance is 4. If three of the five observations are 5, 2 and 8, then the other two observations are:
A. 5, 5 B. 4, 6 C. 3, 7 D. 8, 2