True or false: variance and standard deviation

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   Standard deviation is the square root of the variance.

2. Statement is true

   Yes

   Statement

   Variance uses squared deviations from the mean.

3. Statement is true

   No

   Statement

   Variance can be negative.

4. Statement is true

   Yes

   Statement

   Standard deviation is denoted by σ.

5. Statement is true

   No

   Statement

   Variance and standard deviation are the same number.

Explanation