. 6. Which of the following statements applies to the statistic known as the “standard deviation”?

A. It is a measure of central tendency.

B. It is only applicable to qualitative measurements.

C. Standard deviation is also known as the “variance”.

D. 95% of all data lie within 2 SD of the mean.

7. What is the “average” wage—technically referred to as the arithmetic mean?

A. $475

B. $500

C. $526

D. $5260

8. What is the “median” wage of these ten?

A. $475

B. $500

C. $526

D. $600

9. What is the “mode” value of these ten wages?

A. $475

B. $500

C. $526

D. $620