(Answered) Question refer to the darvas box trading model of problem

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Question: Refer to the Darvas Box trading model of problem. The average profit was 11.46%. If the sample standard deviation was 8.2%, give a 90% confidence interval for average profit using this trading system.

Problem: According to the Darvas Box stock trading system, a trader looks at a chart of stock prices over time and identifies box-shaped patterns. Then one buys the stock if it appears to be in the lower left corner of a box, and sells if in the upper right corner. In simulations with real data, using a sample of 376 trials, the average hold time for a stock was 41.12 days. If the sample standard deviation was 12 days, give a 90% confidence interval for the average hold time in days.

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