In: Statistics and Probability
For cost purposes, Holly’s Nursery managers use two and one half hours of labor time for planting a medium – sized tree. Actual times from a sample of 12 plantings during the past month follow (times in hours). The data below can be imported into Excel for analysis. 1.8 1.2 2.1 2.7 2.7 3 0.6 1.8 2.6 1.3 1.5 0.9 With a 0.05 level of significance, test to see whether the mean tree planting time differs from 2.5 hours. a. State the Null and Alternative hypothesis b. Compute the sample mean c. Compute the sample standard deviation. d. What is the p-value? e. What is your conclusion?
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