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The article "Time Series Analysis for Construction

Statistics for Engineers and Scientists | 4th Edition | ISBN: 9780073401331 | Authors: William Navidi ISBN: 9780073401331 38

Solution for problem 4E Chapter 6.7

Statistics for Engineers and Scientists | 4th Edition

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Statistics for Engineers and Scientists | 4th Edition | ISBN: 9780073401331 | Authors: William Navidi

Statistics for Engineers and Scientists | 4th Edition

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Problem 4E

Problem 4E

The article "Time Series Analysis for Construction Productivity Experiments" (T. Abdelhamid and J. Everett. Journal of Construction Engineering and Management, 1999:87-95) presents a study comparing the effectiveness of a video system that allows a crane operator to see the lifting point while operating the crane with the old system in which the operator relies on hand signals from a tagman. Three different lifts, A, B. and C. were studied. Lift A was of little difficulty, lift B was of moderate difficulty, and lift C was of high difficulty. Each lift was performed several times, both with the new video system and with the old tagman system. The time (in seconds) required to perform each lift was recorded. The following tables present the means, standard deviations, and sample sizes.

 

 

Low Difficulty

 

 

Mean

Standard Deviation

Sample Size

Tagman

47.79

2.19

 

14

 

Video

47.15

2.65

40

 

 

 

Moderate Difficulty

 

Mean

Standard Deviation

Sample Size

Tagman

69.33

6.26

 

12

 

Video

58.50

5.59

24

 

 

High Difficulty

 

 

 

Standard

Sample

 

Mean

Deviation

Size

Tagman

109.71

17.02

17

Video

‘ 84.52 ‘

13.51

29

a. Can you conclude that the mean time to perform a lift of low difficulty is less when using the video system than when using the tagman system? Explain.

b. Can you conclude that the mean time to perform a lift of moderate difficulty is less when using the video system than when using the tagman system? Explain.

c. Can you conclude that the mean time to perform a lift of high difficulty is less when using the video system than when using the tagman system? Explain.

Step-by-Step Solution:
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Introduction Neuroscience: (Neuro = nerve, Greek) the scientific study of the nervous system. Subdivided into many different disciplines. Biological Psychology (behavioral neuroscience): is the study of the biological bases of psychological processes and behavior. Studies the brain structures and functions that respond the experiences and generate behavior. History  Comes from philosophy o Philosophy deals with a lot of things that we cannot observe (morality, the soul) o Psychology observes causes and reactions, uses the scientific method  Zeitgeist: (zeit = time, geist = spirit or wind), spirit of the time o Scientific exploration and explanation influenced by the technology

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Chapter 6.7, Problem 4E is Solved
Step 3 of 3

Textbook: Statistics for Engineers and Scientists
Edition: 4
Author: William Navidi
ISBN: 9780073401331

Statistics for Engineers and Scientists was written by and is associated to the ISBN: 9780073401331. The full step-by-step solution to problem: 4E from chapter: 6.7 was answered by , our top Statistics solution expert on 06/28/17, 11:15AM. Since the solution to 4E from 6.7 chapter was answered, more than 364 students have viewed the full step-by-step answer. The answer to “The article "Time Series Analysis for Construction Productivity Experiments" (T. Abdelhamid and J. Everett. Journal of Construction Engineering and Management, 1999:87-95) presents a study comparing the effectiveness of a video system that allows a crane operator to see the lifting point while operating the crane with the old system in which the operator relies on hand signals from a tagman. Three different lifts, A, B. and C. were studied. Lift A was of little difficulty, lift B was of moderate difficulty, and lift C was of high difficulty. Each lift was performed several times, both with the new video system and with the old tagman system. The time (in seconds) required to perform each lift was recorded. The following tables present the means, standard deviations, and sample sizes. Low Difficulty MeanStandard DeviationSample SizeTagman47.792.19 14 Video47.152.6540 Moderate Difficulty MeanStandard DeviationSample SizeTagman69.336.26 12 Video58.505.5924 High Difficulty StandardSample MeanDeviationSizeTagman109.7117.0217Video‘ 84.52 ‘13.5129a. Can you conclude that the mean time to perform a lift of low difficulty is less when using the video system than when using the tagman system? Explain.________________b. Can you conclude that the mean time to perform a lift of moderate difficulty is less when using the video system than when using the tagman system? Explain.________________c. Can you conclude that the mean time to perform a lift of high difficulty is less when using the video system than when using the tagman system? Explain.” is broken down into a number of easy to follow steps, and 232 words. This textbook survival guide was created for the textbook: Statistics for Engineers and Scientists , edition: 4. This full solution covers the following key subjects: system, difficulty, video, tagman, lift. This expansive textbook survival guide covers 153 chapters, and 2440 solutions.

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