Principles of Information Systems
Principles of Information Systems
13th Edition
ISBN: 9781337660556
Author: Ralph Stair; George Reynolds
Publisher: Cengage Learning US
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Chapter 2, Problem 2CTQ1
Program Plan Intro

Positive Train Control (PTC):

  • Positive train control (PTC) is a system which is used to prevent the train accidents caused by the human errors, such as train-to-train collisions, derailments caused due to excess speed, and unauthorized incursion into work zones.
  • PTC system provides audible and visual signals to the crew member regarding the slowing and stopping of the train.
  • For this purpose very high frequency wireless communication system is required.

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Question 1 Generate a random sample of standard lognormal data (rlnorm()) for sample size n = 100. Construct histogram estimates of density for this sample using Sturges’ Rule, Scott’s Normal Reference Rule, and the FD Rule. Question 2 Construct a frequency polygon density estimate for the sample in Question 1, using bin width determined by Sturges’ Rule.
Generate a random sample of standard lognormal data (rlnorm()) for sample size n = 100. Construct histogram estimates of density for this sample using Sturges’ Rule, Scott’s Normal Reference Rule, and the FD Rule.
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Principles of Information Systems

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