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Probability and Statistics for Engineering and the Sciences | 9th Edition | ISBN: 9781305251809 | Authors: Jay L. Devore
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A study carried out to investigate the

Chapter 1, Problem 81E

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QUESTION:

Problem  81E

A study carried out to investigate the distribution of total braking time (reaction time plus accelerator-to-brake movement time, in ms) during real driving conditions at 60 km/hr gave the following summary information on the distribution of times (“A Field Study on Braking Responses During Driving,” Ergonomics, 1995: 1903–1910):

What can you conclude about the shape of a histogram of this data? Explain your reasoning.

 

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QUESTION:

Problem  81E

A study carried out to investigate the distribution of total braking time (reaction time plus accelerator-to-brake movement time, in ms) during real driving conditions at 60 km/hr gave the following summary information on the distribution of times (“A Field Study on Braking Responses During Driving,” Ergonomics, 1995: 1903–1910):

What can you conclude about the shape of a histogram of this data? Explain your reasoning.

 

ANSWER:

Problem  81E

Answer:

Step1:

We have A study carried out to investigate the distribution of total braking time (reaction time plus accelerator-to-brake movement time, in ms) during real driving conditions at 60 km/hr gave the following summary information on the distribution of times (“A Field Study on Braking Responses During Driving,” Ergonomics, 1995: 1903–1910):

Mean = 535, Median = 500, Mode = 500

Standard deviation = 96, Minimum = 220, Maximum = 925

5th Percentile = 400, 10th percentile = 430

90th percentile = 640, 95th percentile = 720

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