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Question: More hypotheses. Write the null and alternative hypotheses you would use to test each of the following situations.
a) In the 1950s only about 40% of high school graduates went on to college. Has the percentage changed?
b) 20% of cars of a certain model have needed costly transmission work after being driven between 50,000 and 100,000 miles. The manufacturer hopes that a redesign of a transmission component has solved this problem.
c) We field-test a new-flavor soft drink, planning to market it only if we are sure that over 60% of the people like the flavor.
How do you calculate (by hand) the raw score that marks the 40th percentile of a data set with a mean of 47.55 and a standard deviation of 9.133?
In Eurelia there are three categories of bicycle license, with different fees for each. The table below is based on a random sample of 122 Eurelian bicycle-license holders.
Using table 4 in the back of the book, what would be the critical value (rejection value) to test the hypothesis that the means are different?
In a survey conducted by the Council for Marketing and Opinion Research (CMOR), a national nonprofit research industry trade group based in Cincinnati.
can we conclude that women think men are less kind, gentle, and thoughtful in the later survey compared with the earlier one? Hint: For the calculations, assume the latter survey as the first sample.
Determine the expected value and standard error of the sum of 400 draws?
stephanie robbins is the three hills power company management analyst assigned to simulate maintenance costs. in
a marketing survey involves product recognition in new york and california. of 558 new yorkers surveyed 193 knew the
Are all the predictors significant in the presence of others? Use α= 0.05.- Based on the tests in part (b), what terms would you recommend for inclusion in the model?
for 30 randomly selected rolling stones concerts the mean gross earnings is 2.9 million dollars. assuming a population
What is the probability (in 2003) of failing to contact a household or of contacting the household but not getting them to agree to the interview?
below you are given a payoff table involving two states of nature and three decision alternatives.decision alternative
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