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Joans Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost-estimating purposes, managers use two hours of labor time for the planting of a medium-sized tree. Actual times from a sample of 10 plantings during the past month follow (times in hours).1.7, 1.5, 2.6, 2.2, 2.4, 2.3, 2.6, 3.0, 1.4, 2.3With a .05 level of significance, test to see whether the mean tree-planting time differs from two hours.
a. State the null and alternative hypotheses.
b. Compute the sample mean.
c. Compute the sample standard deviation.
d. What is the p-value?
e. What is your conclusion?
In 2010, Forbes magazine listed Bill Gates, the founder of Microsoft, as the richest person in the United States. His personal wealth was estimated to be $53 billion. If there were
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A government can finance its budget deficit by doing all of the following except: A. borrowing from its central bank. B. printing money. C. selling bonds. D. buying bonds.
Singer suggests that although the right to sell blood does not threaten the formal right to give blood, it is incompatible with "the right to give blood, which cannot be bought, wh
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