I the Standard Deviation Is the Positive Square Root of the Variance

question 54

Multiple Choice

i. The standard deviation is the positive square root of the variance.
ii. For a symmetrical distribution, the variance is equal to the standard deviation.
Iii) If the standard deviation of the ages of a female group of employees is six years and the standard deviation of the ages of a male group in the same plant is ten years, it indicates that there is more spread in the ages of the female employees.

• A) (i), (ii) and (iii) are all correct statements
• B) (i) and, (ii) are correct statements but not (iii).
• C) (i) and, (iii) are correct statements but not (ii).
• D) (i) is a correct statement, but not (ii) or (iii).
• E) All statements are false

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