There is some evidence that, in the years 1981 – 85, a simple name change resulted in a short-term increase in the price

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There Is Some Evidence That In The Years 1981 85 A Simple Name Change Resulted In A Short Term Increase In The Price 1 (80.25 KiB) Viewed 72 times

There is some evidence that, in the years 1981 – 85, a simple name change resulted in a short-term increase in the price of certain business firms' stocks (relative to the prices of similar stocks). (See D. Horsky and P. Swyngedouw, "Does it pay to change your company's name? A stock market perspective," Marketing Science v.6, pp. 320 - 35, 1987.) Suppose that, to test the profitability of name changes in the more recent market (the past five years), we analyze the stock prices of a large sample of corporations shortly after they changed names, and we find that the mean relative increase in stock price was about 0.86%, with a standard deviation of 0.10%. Suppose that this mean and standard deviation apply to the population of all companies that changed names during the past five years. Complete the following statements about the distribution of relative increases in stock price for all companies that changed names during the past five years. X $ ? (a) According to Chebyshev's theorem, at least (Choose one) V of the relative increases in stock price lie between 0.66% and 1.06%. (b) According to Chebyshev's theorem, at least 56% of the relative increases in stock price lie between ]% and ]%. (Round your answer to 2 decimal places.)
There are dozens of personality tests available on the World Wide Web. One test, scored on a scale of 0 to 200, is designed to give an indication of how "personable" the test taker is, with higher scores indicating more "personability." Suppose that scores on this test have a mean of 108 and a standard deviation of 24. Complete the following statements about the distribution of scores on this personality test. (a) According to Chebyshev's theorem, at least 36% of the scores lie between 1 and I. (Round your answer to the nearest whole number.) Х $ ? of the (b) According to Chebyshev's theorem, at least (Choose one) scores lie between 60 and 156.