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Runzheimer International publishes results of studies on overseas business travel costs. Suppose as a part of one of these studies the following per diem travel accounts (in dollars) are obtained for 14 business travelers staying in Johannesburg, South Africa. Use these data to construct a 98% confidence interval to estimate the average per diem expense for business people traveling to Johannesburg. What is the point estimate? Assume per diem rates for any locale are approximately normally distributed.
142.59 148.48 159.63 171.93
146.90
168.87 141.94
159.09 156.32 142.49 129.28
151.56
132.87 178.34
What is a Wilcoxon-Whitney Test and when is it used? I am not sure when to use the Wilcoxon-Whitney Test and what it is testing.
Find the median and the first and third quartiles for the number of CDs owned by senior citizens. Develop a box plot for the information.
How would you describe the function of a generalized linear regression model?
Estimated the probability that among 75 randomly selected students, at least 20 of them score greater than 78.
An auditor for American health insurance reports that 20% of policy holders submit a claim during the year. 15 policy holders are selected randomly. What is the probability that at least 3 of them submitted a claim the previous year?
To test the relationship between sex and responsiveness to feedback, a group of men and women were given a vignette describing a person of the opposite sex.
Assuming that the data is normally distributed and the sample size is greater than 30, calculate the critical values for a two tailed and a one-tailed test when alpha = 0.05
If a pet store wishes to determine the level of customer satisfaction with its services, would it be appropriate to conduct an experiment? Explain.
Check that the left hand side of (9) is the standardized slope. Hint: work out the correlation coefficient between the weights and the lengths.
a random sample of 12 second-year university students enrolled in a business statistics course wasdrawn. at the courses
Last year you received an average of 129.2 complaints (i e, individual items to be fixed under warranty) per new car sold, with a standard deviation of 42.1.
what is an independent sample? what is a related sample? when must researchers use different hypothesis tests for
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