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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?
why is international trade important for south Africa
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A local movie theater wants to know how much popcorn they should stock for a given movie showing. Records from 94 movies reveal a mean of 57 boxes and a standard deviation of 17.8.
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A) With asymmetric information, free markets may not lead to efficient outcomes because the market for a service or product may break down due to adverse selection. Explain what ad
developing countries benefit through international trade from developed countries
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