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Business and Management Big banks and cable television providers traditionally receive very low customer service ratings. Many of us simply hate dealing with banks and cable companies. In a recent survey by MSN Money, each participant was asked to select the one item that matters the most in customer service.11 A random sample of consumers was obtained shortly after the 2014 holiday shopping season, and each was also asked the same question. The results are given in the following table.
Conduct a goodness-of-fit test to determine whether there is evidence that the true 2014 proportions of the most important customer service items have changed since the MSN survey. Use a = 0.05.
On each of the previous 25 days, 100 electronic devices of a certain type were randomly selected and subjected to a severe heat stress test. The total number of items that failed to pass the test was 578.
Calculate the elasticity of demand, using the point formula
What is the appropriate degrees of freedom in this case? Give your answer to four decimal places. What is the lower confidence limit on the interval?
a sport preference poll yielded the following data for men and women. use a 5 significance level and test to determine
A new computer chip has one million microdots etched on its surface. In the manufacturing process, 997, 850 dots are imprinted with information.
When the x1's, x2's, ... , and/or the xk's are equally spaced, the calculation of the 's can be simplified by using the coding suggested in Exercise 15. Rework Exercise 80 coding the x1-values -1, 0, and 1 and the x2-values -1 and 1. (Note that for t..
If 20 voters are selected at random, and X is the number of voters which support this referendum, determine the mean and variance of X.
It is interested in estimating a 99.97% worst case for percentage of loan that defaults on the portfolio. Show how this varies with the copula correlation.
you are dealt a hand of three cards from a standard deck of cards one at a time. what is the probability that the first
Construct a grouped frequency distribution using six classes.
Prove that the men's courtship algorithm terminates after at most (n - 1)2 + 1 stages.- Find preference relations under which the algorithm terminates after precisely (n - 1)2 + 1 stages.
If the population standard deviation is 18.8 days, find the 90% confidence interval for the average number of days worked by all employees who are paid through payroll departments.
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