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The regional manager of a large company has asked company headquarters for an increase in his staff from 8 to 9 employees. For budgetary reasons, the company administration is reluctant to approve the increase. In order to resolve the debate, the manager and company administration agree to examine data regarding the staff size of other managers with similar scopes of responsibility (number of team members, sales area, etc.) to the regional manager. These data are presented below. Should the manager be given an increase in staff? Why or why not? Please show your work.
Size of manager's staff Number of managers
5 people 216 people 397 people 318 people 989 people 1210 people 11
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For an arch chosen at random in Arches National Park, use the preceding information to estimate the probability that the height of the arch poening is:
Would it be reasonable to conclude that the population mean is 63 pounds?
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He randomly samples 45 oil wells throughout the United States and determines the mean output to be 10.7 barrels per day with a standard deviation of 1.3 barrels. Test the researcher's claim at the .025 level of significance.
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