# 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?

## Relevant Questions

Define (a) Productivity, (b) Quality control, and (c) Process control. Set up control limits for an x-bar chart, given x-bar = 12.50, R–bar = .42, and n = 5. Create control limits for a p chart for a process with π = .02 and subgroup size n = 500. Is it safe to assume normality? Explain. De ne three quality metrics that might be used to describe quality and performance for the following services: (a) Your cellular phone service (e.g., Verizon); (b) Your Internet service provider (e.g., AOL); (c) Your dry ...17.48 Refer to the bolt strength problem 17.47. Assume μ = σ 6,050 and 5 100. Use the following 24 individual bolt strength observations to answer the questions posed. (a) Prepare a histogram and/or normal probability ...Post your question