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Consider independent random samples of sizes n1 = 10 and n2 = 16 from normal populations.
a. Write the four parts for a two-sided hypothesis test concerning the population variances with a = 0.01.
b. Suppose s12 = 426.42 and s22 = 88.36. Find the value of the test statistic, and draw a conclusion about the population variances.
c. Find bounds on the p value associated with this hypothesis test.
Using the 0.10 level of significance, is there evidence that the population mean is above $300?
A correlation between variables, however, does not automatically mean that the change in one variable is the cause of the change in the values of the other variable. Correlation as a statistic cannot explain why or how the relationship between two..
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Conduct a hypothesis test to determine whether there is any evidence to suggest that the mean income per year of corporate communications workers has decreased. Assume σ = 3750 and use a = 0.01.
have them both consider the question and then either give the common answer if they agree or, if they disagree, flip a coin to determine which answer to give?
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Recent actual and forecasted data for product XYZ is given in the following table.
an individual who has automobile insurance from a certain company is randomly selected. let y be the number of moving
Contrast what you can learn from a scatter plot and T with what you can learn from a confidence limit about the differences in the means.
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