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Ten prominent citizens have been nominated for a community's "Citizen of the Year" award. First- and second-place trophies are awarded to the two persons receiving the highest and second-highest number of votes. In how many different ways can the trophies be awarded?
Assume that 5,000 sales invoices are separated into four strata. Stratum 1 contains 50 invoices, stratum 2 contains 500 invoices, stratum 3 contains 1,000 invoices, and stratum 4 contains 3,450 invoices.
a) Test whether there is a difference between attitudes in the 2 cities. Use a 95% alpha. b) What does your result say about attitude consistency across cities?
At a recent meeting of educational researchers comparison were made between the type of college freshmen attend and the numbers who drop out.
What percent of sales representatives earn more than $42,000 per year?
Twelve cases of leukemia are reported in people living in a particular census tract over a 5-year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cancer-incidence rates?
Generate a 95% confidence interval for the difference in mean HDL levels between men when exercise regularly and those who do not.
If HIV virus is actually present, the probability that ELIA test will give a positive result from ELISA is .01. If ELISA has given a positive result, use the Bayes' theorem to find the probability that the HIV virus is actually present.
Conduct the appropriate analysis to determine if there was an effect of the music on completing problems. Construct the appropriate graph to show the differences in the scores of the two groups.
Fitting of multiple linear regression equation - Give a list of the model assumptions for a regression model.
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
ABC insurance sells term life insurance policies. If the plicy holder dies during the term of the policy ABC pays out $100000. If the person does not die ABC pays nothing and there is no further value to the policy.
Test the hypothesis that no difference exists between the groups at α = .05 and perform and report all related tests and statistics.
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