oan'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 hours). 1.8 1.6 2.5 2.1 2.4 2.3 2.6 3.0 1.4 2.3 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. A. H0: μ ≥ 2 Ha: μ < 2 B. H0: μ > 2 Ha: μ ≤ 2 C. H0: μ = 2 Ha: μ ≠ 2 D. H0: μ ≤ 2 Ha: μ > 2 E. H0: μ < 2 Ha: μ ≥ 2 (B)Compute the sample mean. _______________ (C)Compute the sample standard deviation. (Round your answer to three decimal places.) ______________
oan'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 hours). 1.8 1.6 2.5 2.1 2.4 2.3 2.6 3.0 1.4 2.3 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. A. H0: μ ≥ 2 Ha: μ < 2 B. H0: μ > 2 Ha: μ ≤ 2 C. H0: μ = 2 Ha: μ ≠ 2 D. H0: μ ≤ 2 Ha: μ > 2 E. H0: μ < 2 Ha: μ ≥ 2 (B)Compute the sample mean. _______________ (C)Compute the sample standard deviation. (Round your answer to three decimal places.) ______________
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Problem 1P
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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 hours).
1.8 | 1.6 | 2.5 | 2.1 | 2.4 | 2.3 | 2.6 | 3.0 | 1.4 | 2.3 |
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.
A. H0: μ ≥ 2
Ha: μ < 2
B. H0: μ > 2
Ha: μ ≤ 2
C. H0: μ = 2
Ha: μ ≠ 2
D. H0: μ ≤ 2
Ha: μ > 2
E. H0: μ < 2
Ha: μ ≥ 2
(B)Compute the sample mean.
_______________
(C)Compute the sample standard deviation. (Round your answer to three decimal places.)
______________
(D)What is the test statistic? (Round your answer to three decimal places.)
_____________________
What is the p-value? (Round your answer to four decimal places.)
p-value =________________
(E)What is your conclusion?
A. Do not reject H0. We can conclude that the mean tree-planting time differs from two hours. There is a reason to change from the two hours for cost estimating purposes.
B. Reject H0. We cannot conclude that the mean tree-planting time differs from two hours. There is no reason to change from the two hours for cost estimating purposes.
C. Reject H0. We can conclude that the mean tree-planting time differs from two hours. There is a reason to change from the two hours for cost estimating purposes.
D. Do not reject H0. We cannot conclude that the mean tree-planting time differs from two hours. There is no reason to change from the two hours for cost estimating purposes.
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