9.1.77.T – A Newspaper Reports Governor’s Approval Rating
MyStatLab
Pearson
They give you some polling data and ask you what the confidence level is.
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They give you some polling data and ask you what the confidence level is.
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They tell you the % of adults over 50 who have never graduated from high school and ask how many should be surveyed with various margin of errors.
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You’re given a test hypothesis and a P-value. Then you’re asked to find and interpret the decision using the significance provided. If the decision from (a) is an error, what kind? Lastly, they give you a new significance level and ask about your decision and if it’s an error, and what type.
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Test the manager’s claim that the mean guest bill for a weekend is $600 or less by selecting the appropriate form of hypothesis. If the null hypothesis cannot be rejected, we cannot conclude that the manager’s claim is wrong. However, if the null hypothesis can be rejected, we can conclude that the manager’s claim is wrong.
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Formulate hypotheses to decide whether to shut down and adjust the production line based on sample data. Determine if evidence suggests the production line is not operating properly or if overfilling or underfilling exists.
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Construct a point estimate of the proportion of items returned for the population of sales transactions at the store in the given city. Construct a confidence interval for the proportion of returns. Develop appropriate hypotheses, find the test statistic, p-value, and conclusion.
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Formulate the null and alternative hypotheses for an automobile dealership’s sales volume bonus plan study, select the appropriate conclusion when the null hypothesis cannot be rejected, and also when it can be rejected.
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Determine if Steve Contois’ new compensation plan increases average sales per salesperson at Carpetland. Develop null and alternative hypotheses, identify Type I error and consequences, as well as Type II error and consequences.
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Formulate hypotheses to determine if the mean rate per 5 CCF of residential water charged by U.S. public utilities differs from the rate charged by the city of Tulsa. Choose the correct null hypothesis and alternative hypothesis. Calculate the p-value for the hypothesis test. Determine if the null hypothesis can be rejected at α = 0.05. Draw a conclusion regarding the difference in residential water rates between U.S. public utilities and Tulsa. Repeat the hypothesis test using the critical value approach.
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Develop hypotheses to test if the population proportion of credit card customers using discount coupons is sufficient for national promotion. Conduct the hypothesis test using the sample data file, then make a decision on whether Eagle Outfitters should proceed with the promotion nationally.
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