Variability in Daily Change in Stock Price. 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. Compute the sample variance for the daily price change. Compute the sample standard deviation for the price change Provide 95% confidence interval estimates of the population variance and the population standard deviation.
Variability in Daily Change in Stock Price. 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.
- Compute the sample variance for the daily price change.
- Compute the sample standard deviation for the price change
- Provide 95% confidence
interval estimates of the population variance and the population standard deviation.
Price Change Price Change
Company ($) Company ($)
Aflac 0.81 Johnson & Johnson 1.46
Altice USA 0.41 Loews Corporation 0.92
Bank of America -0.05 Nokia Corporation 0.21
Diageo plc 1.32 Sempra Energy 0.97
Fluor Corporation 2.37 Sunoco LP 0.52
Goodrich Petroleum 0.3 Tyson Foods, Inc. 0.12
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