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Question: In May 2007, a banker was arrested and charged with insider trading after government investigators had secretly looked at a sample of nine of his many trades and found that on these trades he had made a total of $7.5 million. Compute the average earning per trade. Assume also that the sample standard deviation was $0.5 million and compute a 95% confidence interval for the average earning per trade for all trades made by this banker. Use the assumption that the nine trades were randomly selected.
Average length of trout caught in Swanson lake is u=19.For a random sample of 51 fish caught the mean length was xbar=18.5 inches with estimated standard deviation s=3.2 inches.
Translate the following arguments into symbolic notation.- If you enter the teaching profession, you will have no money for vacations; and if you do not enter the teaching profession, you will have no time for vacations.
1. in 2005 the average gpa for students was 3.15. a sample in 2008 showed that the average gpa for students was 3.46.
if the probability is 0.1 that a person will make a mistake on his or her state income tax return find the probability
The Statistics Department has an undergraduate program learning objective that focuses on correctly identifying various concepts
The ages of cars owned by all employees of a large company have a bell shaped distribution with a mean of 8 years and a standard deviation of 2 years. Using the empirical rule, find the approx. percentage of cars (owned by those employees) that are b..
a new extended lightbulb has an average service life of 750 hours. with a standard deviation of 50 hours. if the
Colleges and universities are requiring an increasing amount of information about applicants before making acceptance and financial aid decisions. Classify each of the following types of data required on a college application as quantitative or qu..
What are different methods of graphical representation of data? Explain them. Distinguish Histogram and Histogram clearly with illustrations.
A role as a statistical consultant. You are the statistical expert for a graduate student planning her PhD research.- Explain in simple terms why this would not be a good use of statistical methods.
listed below is the amount of commissions earned last month for a sample of eight members of the sales staff at best
At the 0.025 level of significance, test whether customer size might be independent of estimation accuracy.
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