Question 31
StatisticsCalculate the variance of √2, (1 + √2) and (2 + √2)
- A.0
- B.√(2/3)
- C.2/3
- D.2
Show the answer and explanation
Answer: C (2/3)
Explanation
The mean is 1 + √2; deviations −1, 0, 1. Variance = (1 + 0 + 1)/3 = 2/3.
Calculate the variance of √2, (1 + √2) and (2 + √2)
Answer: C (2/3)
The mean is 1 + √2; deviations −1, 0, 1. Variance = (1 + 0 + 1)/3 = 2/3.