Question

The variance of 6 values is 64. If each value is doubled, find the standard deviation.

• A. 16
• B. 11
• C. 13
• D. 17

Answer 1

Answer:

A. 16

Answer: A Variance = σ² Standard deviation = √(σ²) = √64 Standard deviation = σ = 8 New standard deviation = λσ (where λ= n times each value) = 2 × 8 = 16 Hence the answer is 16.