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Random samples of populations (in thousands) of U.S. cities in three sections of the country are listed. Is there evidence to conclude a difference in means at the 0.001 level of significance?
Eastern Third
Middle Third
Western Third
187
217
276
146
478
110
362
277
177
186
113
122
174
128
134
248
150
137
335
198
338
255
A) Solve using a one-way ANOVA test
B) Solve using a Kruskal-Wallis test
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Construct a 90% two-sided confidence interval onthe difference between the proportion nonconforming in processes 1 and 2. Based on this confidence interval, can you conclude at a significance level of 10% that the difference is not equal to 10%? W..
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The computed value of chi-square: Which of the following is true about the F distribution:
Use the traditional method to test the given hypothesis. Assume that the population is normally distributed and that the sample has been randomly selected.
Finding probability for the given values of the uniform density curve
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Among coffee drinkers, men drink a mean of 3.2 cups per day with a standard deviation of 0.8 cups. assume the number of coffee drinks per day follows a normal distribution.
Suppose you are a researcher who has collected and analyzed a sample of values. When you perform a hypothesis test the p-value is calculated to be 0.051. Would you reject or fail to reject the null hypothesis? Defend your choice.
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