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Determine the critical region and critical values for z that would be used to test the null hypothesis at the given level of significance, as described in each of the following:
(A) and , α = 0.05(B) and , α = 0.10(C) and , α = 0.01
Dr Johnson wants to know if there is sufficient evidence to conclude that the grade distribution of his class is different than the historical grade distribution. Use a =.05 and .01 and perform a goodness of fit test.
Analyze the DT to determine the optimal strategy for the company. What is the expected value of the optimal strategy? Develop a risk profile for the optimal strategy.
Write the regression. Interpret the regression constant and regression coefficient. Forecast a value for monthly salary.
Top management earn between $50,000 and $100,000 per year. A histogram of all salaries would have which of the following shapes?
Given that the mean of 100 observations is 42.5 and that their standard deviation is 6.313, find the sum of the squares of the observations.
Here are the DMS odor thresholds for 10 untrained students:
If we assume that the download times are normally distributed, what percent of users will wait between 5 and 10 seconds for the homepage to download?
Independent random samples taken at two companies provide the following information regarding the anual salaries of the employees.
Compute the z-score for M=89 for a sample of n=25 scores. Is this sample mean in the middle 95% of the distribution?
The Gallup Poll asked a sample of 178 U.S. adults, "Did you, yourself, happen to attend church or synagogue in the last 7 days? Use "Plus Four" method to have a more accurate 95% confidence interval.
What about these descriptive statistics makes you wary or uncomfortable? In other words, if you were a real estate agent, would you go around spouting the answers that you gave above? Explain.
A hypothesis will test that two population means are equal. A sample of 10 with a standard deviation of 3 is selected from the first population and a sample of 15 with a standard deviation of 8 from the second population.
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