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Math · Statistics And Probability
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The Wall Street Journals Shareholder Scoreboard tracks the performance of 1000 major U.S. companies. The performance of each company is rated based on the annual total return, including stock price changes and the reinvestment of dividends. Ratings are assigned by dividing all 1000 companies into five groups from A (top 20%), B (next 20%), to E (bottom 20%). Shown here are the one- year ratings for a sample of 60 of the largest companies A BC 5 8 152012 Can you conclude that the largest companies differ in performance from the 1000 companies in the Shareholder Scoreboard? Use α = .05. Use Table 12.4. Compute the χ 2 test statistic (to 2 decimals). The p value is Select Do the largest companies differ in performance from the 1000 companies in the Shareholder Scoreboard? Select In general, how did the performance of the largest companies compare to that of the other companies? Select

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