You may need to use the appropriate technology to answer this question. 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 numb 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 1.4 2.7 2.2 2.3 2.3 2.6 3.0 1.5 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. Mg: < 2 M₂² 4+2 114x2 M₂N2 H₂>2 M₂: 4×2 (b) Compute the sample mean 22

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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 numb
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 1.4 2.7 2.2 2.3 2.3 2.6 3.0 1.5 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.
Mo #2
M₂: #22
•12-2
M₂³ +2
136²42
M₂2
© A * ૨
H₂>2
022
M₂N< 2
(b) Compute the sample mean
22
(c) Compute the sample standard deviation. (Round your answer to three decimal places)
Transcribed Image Text:You may need to use the appropriate technology to answer this question. 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 numb 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 1.4 2.7 2.2 2.3 2.3 2.6 3.0 1.5 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. Mo #2 M₂: #22 •12-2 M₂³ +2 136²42 M₂2 © A * ૨ H₂>2 022 M₂N< 2 (b) Compute the sample mean 22 (c) Compute the sample standard deviation. (Round your answer to three decimal places)
(c) Compute the sample standard deviation. (Round your answer to three decimal places.)
0.523
(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=
-0
(e) What is your conclusion?
O Reject He. 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.
O Reject H. 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.
O Do not reject M. 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.
O Do not reject He 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.
Oth
Transcribed Image Text:(c) Compute the sample standard deviation. (Round your answer to three decimal places.) 0.523 (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= -0 (e) What is your conclusion? O Reject He. 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. O Reject H. 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. O Do not reject M. 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. O Do not reject He 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. Oth
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