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Refer to the Darvas Box trading model of given 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.
A film alliance used a random sample of 50 U.S. citizens to estimate that the typical American spent 78 hours watching videos and DVDs last year. The standard deviation of this sample was 9 hours.
Formulate a hypothesis that can be used to determine whether the mean annual consumption in webster city is higher than the national mean.
Scores on a quiz are normally distributed with a mean of 20 and a standard deviation of 6. How would adding 5 points to each students quiz change the mean of the distribution of quiz scores?
Based on the histogram, find the proportion of commute distances in the sample that are at least 16 miles. Write your answer as a decimal, and do not round your answer.
Let X1, ..., Xn be a random sample from a two-parameter exponential distribution, Xi ~ EXP (theta, eta). (a) Assuming it is known that eta = 150, find a pivotal quantity for the parameter theta based on the sufficient statistic.
Of the households with NOW accounts 79.3% had savings accounts. The probability that a randomly selected household with a savings account has no checking account is?
Formulate a linear programming model that can be used to develop a daily production schedule for the Buffalo and Dayton plants that will maximize daily production of ignition systems at Cleveland.
a population has mean 20. a simple random sample of size 100 is selected from this population. what is the mean of the
Give critical test statistic and compute sample test statistic. Test null hypothesis at alpha level .01.
a refrigerated delivery truck has a load of perishable goods worth 10000. if the refrigeration unit is not cold enough
hypothesis testing is one of the mainstays of medical research literature. you would be hard-pressed to find a research
causality and inferencein may 1998 the new york times carried an article by adam bryant describing a research project
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