1. Use the following data sample to answer the question.

4, 14, 6, 9, 21, 3, 7, 10

What's the standard deviation of this data sample?

A. 243.5

B. 5.90

C. 4.33

D. 34.79

2. Which of the following statements about interpreting standard deviation is true?

A. Chebyshev's Rule can't be applied unless the frequency distribution is mound-shaped and symmetric. The Empirical Rule can be applied to any data set, regardless of the shape of its frequency distribution.

B. Neither Chebyshev's Rule nor the Empirical Rule require any assumptions about the frequency distribution.

C. Neither the Empirical Rule nor Chebyshev's Rule can be applied to data unless the frequency distribution is mound-shaped and symmetrical.

D. The Empirical Rule can't be applied unless the frequency distribution is mound-shaped and symmetric. Chebyshev's Rule can be applied to any data set, regardless of the shape of its frequency distribution.