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The average annual return on a certain stock is 8.3%, and the variance of the returns on the stock is 2.3.
Another stock has an average return of 8.4% per year and a variance of 6.4. Which stock is riskier? Why?
Furthermore, 357 employees both are college-educated and have had the vocational training. If an employee is chosen at random, what is the probability that he or she is college-educated or has had the training or both?
a manufacturer claims the average life of a product is 500 hours. the lifetime of the product is assumed to follow an
Discuss in groups and comment on the statement that if managers learned how to conduct research by taking a course such as this there would no need to seek outside consultant help to solve their problems.
A company that relies on Internet-based advertising linked to key search terms wants to understand the relationship between the amount it spends on this advertising and revenue (in $).
Use these statistics to construct a 94% confidence interval for the mean monthly consumption for the population of all Ontario households.
find the minimum sample size n needed to estimate u for the given values of c s and ec 0.98 s6.4 e1assume that a
Assume that the weight of fish for both lakesare normally distributed with equal population standard deviations. Test at =.01 significance level,if the mean weights of fish are different for these two lakes
what is the importance of statistics in business decision making? describe a business situation where statistics was
Calculate the least-squares regression line for these data using matrix operations.
Construct a 99% confidence interval estimate of the mean body mass index for men. Construct a 99% confidence interval estimate of the mean body mass index for women
business and society march 2011 published a study on the sustainability behaviors of cpa corporations. the level of
A researcher finds a correlation between self esteem and shyness is -0.50, which is significant for his sample. Interpret this correlation.
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