Question: Consider a day when the Dow Jones industrial average went up 149.82 points. The following table shows the stock price changes for a sample of

Consider a day when the Dow Jones industrial average went up 149.82 points. The following table shows the stock price changes for a sample of 12 companies on that day.

a. Compute the sample variance for the daily price change.

b. Compute the sample standard deviation for the price change.

Consider a day when the Dow Jones industrial average went

c. Provide 95% confidence interval estimates of the population variance and the population standard deviation?

Price Change Price Change Company John.&John. Loews Cp Nokia SmpraEngy Sunoco Tyson Food Company 0.81 -0.05 0.41 1.32 2.37 0.3 1.46 0.92 0.21 0.97 0.52 0.12 Bank of Am. Cablevision Goodrich

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