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Write the claim as a mathematical sentence. Stating the null and alternative hypotheses, and identify which represents the claim. A radio station publicizes that its proportion of the local listening audience is greater than 39%.
Give a 99% confidence interval for the proportion of all U.S. adults who attended church or synagogue during the week preceding the poll.
If the 95% confidence interval for the average age of a learner at Capella is 27.8 yrs.
A. What is the 90% confidence interval for the daily sales at all restaurants. B. What is the probability that the average sales are really $32,000 or more per day? Assume that the population average is $30,000 per day and the std. Deviation is $2..
At the .05 significance level, can the developer conclude there is a difference in the mean income? Use the five-step hypothesis testing procedure.
Department decided to conduct the test at the 0.05 level of significance whether the modification actually increased the life of the AAA battery. What was their decision rule?
In healthy adults, x is approximately normally distributed with mean µ = 38 and standard deviation σ = 12. What is the probability that:
If the same sample results had been obtained from a random sample of 16 students, could the students' claim be accepted at a lower level of significance?
In analyzing two independent small samples you notice that the standard deviation for both samples are the same. How does this affect the S2p (the pooled variance)? Explain your answer.
The typical homeowner has a utility function equal to the square root of wealth. Will the homeowner retrofit the house, and if so, which insurance policy will the homeowner buy?
A study conducted by the research department of a pharmaceutical company claims that the annual spending (per person) for prescription drugs for allergy relief,is greater than or equal to the annual spending (per person) for non-prescription aller..
Annually from tornadoes in the U.S.A. is less than 30. If a sample of 9 randomly selected years had a standard deviation of 29, is the claim believable? Use = .01?
Blockbuster is testing a new policy of waiving all late fees on DVD rentals using a sample of 10 randomly chosen customers.
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