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). O1.6 1.6 2.5With 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.Hỏi sự 2H₂: H+2Ho: MS2H₂H > 2OHo: > 2H: NS2Hoi #22H₂: <2Ho: <2H₂H222.6 3.0 1.4 2.3(b) Compute the sample mean.2.2(c) Compute the sample standard deviation. (Round your answer to three decimal places.)X(d) What is the test statistic? (Round your answer to three decimal places.)xWhat is the p-value? (Round your answer to four decimal places.).p-value

Given data: 1.6, 1.6, 2.5, 2.3, 2.4, 2.3, 2.6, 3, 1.4, 2.3 Level of significance, α=0.05 Claim: The…

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. Ho: N=2 H₂+2 O 1.6 1.6 Ho: S2 H₂H>2 Ho: > 2 H₂HS2 Ho: #22 H₂H <2 Ho: <2 H₂H22 (b) Compute the sample mean. 2.2 (c) Compute the sample standard deviation. (Round your answer to three decimal places.) x (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=

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. Ho: N=2 H₂+2 O 1.6 1.6 Ho: S2 H₂H>2 Ho: > 2 H₂HS2 Ho: #22 H₂H <2 Ho: <2 H₂H22 (b) Compute the sample mean. 2.2 (c) Compute the sample standard deviation. (Round your answer to three decimal places.) x (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=

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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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 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).