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 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 2 hours). 3.2 1.5 1.7 2.5 3.0 2.5 2.3 1.8 3.7 2.7 With a 0.05 level of significance, test to see whether the mean tree-planting time differs from two 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. (to 3 decimals) p-value: here is the choices lower than 0.01 between 0.01 and 0.025 between 0.05 and 0.0250 between 0.05 and 0.10 between 0.10 and 0.20 greater than 0.20 e. What is your conclusion? We do or do not reject the null hypothesis. There is or is not enough evidence to prove that the mean tree-planting time differs from 2 hours.
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 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 2 hours).
| 3.2 | 1.5 | 1.7 | 2.5 | 3.0 | 2.5 | 2.3 | 1.8 | 3.7 | 2.7 |
With a 0.05 level of significance, test to see whether the
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.
| (to 3 decimals) | |
|
p-value: here is the choices |
lower than 0.01 between 0.01 and 0.025 between 0.05 and 0.0250 between 0.05 and 0.10 between 0.10 and 0.20 greater than 0.20 |
e. What is your conclusion?
We do or do not reject the null hypothesis. There is or is not enough evidence to prove that the mean tree-planting time differs from 2 hours.
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