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Save Submit Assignment for Grading tions Exercise 09.34 Algo (Population Mean: Sigma Unknown) Question 7 of 10 Check My Work (2 remaining) O Joan's 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 O 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). 1.5 2.4 2.9 1.3 2.7 2.2 1.6 3.4 2.0 2.2 With a 0.05 level of significance, test to see whether the mean tree-planting time differs from two hours. a. State the null and alternative hypotheses. Ho : p - Select your answer - V 2 H. : p - Select your answer - V 2 b. Compute the sample mean. (to 2 decimals) c. Compute the sample standard deviation. (to 4 decimals) d. Find the test statistic and p-value. (Use Table 2 in Appendix B.) (to 3 decimals) p-value - Select your answer- e. What is your conclusion? We - Select your answer - v| reject the null hypothesis. There - Select your answer - |enough evidence to prove that the mean tree-planting time differs from 2 hours. Check My Work (2 remaining) = Icon Key Question 7 of 10 Exercise 09.34 Algo (Population Mean: Sigma Unknown)