The standard deviation of a sample of 100 observations equals 64. The variance of the sample equals?
- 8
- 10
- 6400
- 4096
Explanation
The variance of a sample is calculated as the square of the standard deviation. Since the standard deviation is 64, the variance is:
Variance = σ^2 = 64^2 = 4096
So, the correct answer is 4096.
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