169 what does a smaller standard deviation tell you

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16.9
What does a smaller standard deviation tell you about the spread of the scores in that class?
( circle the statement below that completes the interpretation. )
the test scores in the other class.
8. The standard deviation is often used by investors to measure the risk of a stock or a stock portfolio. The basic idea is that the standard deviation is a measure of volatility : the more a stock's returns vary from the stock's average return, the more volatile the stock. Consider the following two stock portfolios and their respective returns (in percent) over the last six months. Questions: a) Calculate the mean percent returns, range, sample standard deviation and sample variance for the six percent-returns of both stock portfolios. Round your answers to 3 decimal places. 3 %
b) Compare the final values of the portfolio during the six-month period. Describe any trend or trends?
c) Compare the range and the standard deviation of the six returns of both portfolios. Which stock portfolio is considered more volatile? Explain why.

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