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Several oil companies are jointly planning to build an oil pipeline to connect several southwestern and midwestern cities. The miles between cities are shown in the following table:
Determine a pipeline system that will connect all 10 cities using the minimum number of miles of pipe, and indicate how many miles of pipe will be used.
Write a correct null and alternative hypothesis for testing the claim that the mean life of a battery for a cell phone is at least 115 hours.
For three independent samples, each with n = 100, the respective sample proportions are 0.30, 0.35, and 0.25. Use the 0.05 level in testing whether the three population proportions could be the same.
This activity is a revision of an activity found in Real Data: A Statistics Workbook Based on Empirical Data by Z. C Holcomb (1997). Published by Pyrczak Publishing.
A survey of 800 women shoppers found that 17% of them shop on impulse. What is the 98% confidence interval for the true proportion of women shoppers who shop on impulse?
at a dog park 35 of dogs are purebred and the rest are mixed breeds. 40 of the dogs are aggressive. at the same time we
question a professional hockey player played 20 seasons. the following table shows the number of games in which he
sven hendriksson finds that one of his productivity measures is related to the number of employees e and the production
whereas Zoe's class has an average of 83% with a standard deviation of 12%. Assume that scores in both classes follow a normal distribution. Convert Maria's midterm score of 84 to a standard z score.
We have a "test" and a "control" group. We calculated a market share percentage for both groups, the test group was in a market that received advertising from our client, the control group was in a market that did not see advertising.
A scatter plot and regression line can be used for all of the following EXCEPT
a government testing agency studies aspirin capsules to see if customers are getting cheated with capsules that contain
These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below for the statement "The instructor is an excellent teacher.
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