The data give the market share (0 to 100%) of a brand-name pharmaceutical product in 224 metropolitan
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(a) Describe the histogram and boxplot of the market shares. Is the histogram symmetric and unimodal? Would you say that this histogram is bell shaped?
(b) Are there any outliers? In what location does this brand have the highest market share? The lowest?
(c) The market share can only be as large as 100 and cannot be negative. Since a normal model allows for any value, is it possible for a normal model to describe these shares? Would a normal model be reasonable if the average share were closer to 0 or 100%?
(d) What normal model describes the distribution of returns of these shares?
(e) Is the normal model in part (d) a good description of these shares? Explain how you decided whether it’s a good match or not. Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
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Related Book For
Statistics For Business Decision Making And Analysis
ISBN: 9780321890269
2nd Edition
Authors: Robert Stine, Dean Foster
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