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The following observations are on stopping distance (ft) of a particular truck at 20 mph under specified experimental conditions. 32.1 30.8 31.1 30.4 31.0 31.9 USE SALT The report states that under these conditions, the maximum allowable stopping distance is 30. A normal probability plot validates the assumption that stopping distance is normally distributed. (a) Does the data suggest that true average stopping distance exceeds this maximum value? Test the appropriate hypotheses using a = 0.01. State the appropriate hypotheses. ⒸHO: 30 H₂:μ < 30 ⒸHO: #30 H₁:μ= 30 ⒸH₂: μ = 30 H₂:μ> 30 ⒸHO: H = 30 H₂:μ* 30 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to three decimal places.) P-value What can you conclude? O Reject the null hypothesis. There is not sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. O Reject the null hypothesis. There is sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. O Do not reject the null hypothesis. There is sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. =

The following observations are on stopping distance (ft) of a particular truck at 20 mph under specified experimental conditions. 32.1 30.8 31.1 30.4 31.0 31.9 USE SALT The report states that under these conditions, the maximum allowable stopping distance is 30. A normal probability plot validates the assumption that stopping distance is normally distributed. (a) Does the data suggest that true average stopping distance exceeds this maximum value? Test the appropriate hypotheses using a = 0.01. State the appropriate hypotheses. ⒸHO: 30 H₂:μ < 30 ⒸHO: #30 H₁:μ= 30 ⒸH₂: μ = 30 H₂:μ> 30 ⒸHO: H = 30 H₂:μ* 30 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to three decimal places.) P-value What can you conclude? O Reject the null hypothesis. There is not sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. O Reject the null hypothesis. There is sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. O Do not reject the null hypothesis. There is sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. =

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The following observations are on stopping distance (ft) of a particular truck at 20 mph under specified experimental conditions. 32.1 30.8 31.1 30.4 31.0 31.9 USE SALT The report states that under these conditions, the maximum allowable stopping distance is 30. A normal probability plot validates the assumption that stopping distance is normally distributed. (a) Does the data suggest that true average stopping distance exceeds this maximum value? Test the appropriate hypotheses using a = 0.01. State the appropriate hypotheses. ⒸHO: H * 30 H:μ < 30 ⒸHO:μ # 30 H₁₂ : μ = 30 O Ho: μ = 30 H₂:μ> 30 Ho: μ = 30 H₂:μ # 30 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to three decimal places.) t = P-value = What can you conclude? O Reject the null hypothesis. There is not sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. O Reject the null hypothesis. There is sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. O Do not reject the null hypothesis. There is sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. O Do not reject the null hypothesis. There is not sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. (b) Determine the probability of a type II error when a = 0.01, a = 0.65, and the actual value of μ is 31 (use either statistical software or Table A.17). (Round your answer to three decimal places.) B = Repeat this for u = 32. (Round your answer to three decimal places.) B = (c) Repeat (b) using a = 0.80. Use μ = 31. (Round your answer to three decimal places.) B = Use μ = 32. (Round your answer to three decimal places.) B = Compare to the results of (b). O We saw B increase when o increased. O We saw ß decrease when o increased. (d) What is the smallest sample size necessary to have a = 0.01 and 8 = 0.10 when μ = 31 and σ = 0.65? (Round your answer to the nearest whole number.)
Transcribed Image Text:The following observations are on stopping distance (ft) of a particular truck at 20 mph under specified experimental conditions. 32.1 30.8 31.1 30.4 31.0 31.9 USE SALT The report states that under these conditions, the maximum allowable stopping distance is 30. A normal probability plot validates the assumption that stopping distance is normally distributed. (a) Does the data suggest that true average stopping distance exceeds this maximum value? Test the appropriate hypotheses using a = 0.01. State the appropriate hypotheses. ⒸHO: H * 30 H:μ < 30 ⒸHO:μ # 30 H₁₂ : μ = 30 O Ho: μ = 30 H₂:μ> 30 Ho: μ = 30 H₂:μ # 30 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to three decimal places.) t = P-value = What can you conclude? O Reject the null hypothesis. There is not sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. O Reject the null hypothesis. There is sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. O Do not reject the null hypothesis. There is sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. O Do not reject the null hypothesis. There is not sufficient evidence to conclude that the true average stopping distance does exceed 30 ft. (b) Determine the probability of a type II error when a = 0.01, a = 0.65, and the actual value of μ is 31 (use either statistical software or Table A.17). (Round your answer to three decimal places.) B = Repeat this for u = 32. (Round your answer to three decimal places.) B = (c) Repeat (b) using a = 0.80. Use μ = 31. (Round your answer to three decimal places.) B = Use μ = 32. (Round your answer to three decimal places.) B = Compare to the results of (b). O We saw B increase when o increased. O We saw ß decrease when o increased. (d) What is the smallest sample size necessary to have a = 0.01 and 8 = 0.10 when μ = 31 and σ = 0.65? (Round your answer to the nearest whole number.)
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