# Question: Samples are shown of volatility coefficient of variation for sector

Samples are shown of volatility (coefficient of variation) for sector stocks over a certain period of time.

(a) At α = .05, is there a difference in median volatility in these four portfolios? Use MegaStat, MINITAB, or a similar computer package for the calculations.

(b) Use one-factor ANOVA to compare the means. Do you reach the same conclusion?

(c) Make a histogram or other display of each sample. Would you be willing to assume normality?

(a) At α = .05, is there a difference in median volatility in these four portfolios? Use MegaStat, MINITAB, or a similar computer package for the calculations.

(b) Use one-factor ANOVA to compare the means. Do you reach the same conclusion?

(c) Make a histogram or other display of each sample. Would you be willing to assume normality?

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