Database Systems: Design, Implementation, & Management
Database Systems: Design, Implementation, & Management
13th Edition
ISBN: 9780357155868
Author: Carlos Coronel; Steven Morris
Publisher: Cengage Learning US
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Chapter 4, Problem 10P

a.

Explanation of Solution

Crow’s Foot ER diagram for first LOST:

The following data model shows the solution for the given question.

Explanation:

  • In the above data model, “Tour” table contains details of the tour and the “Tour” can have many “Qualification” which equally “Guide” can works in many “Qualification”. Here the M:N relationship is break into two 1:N relationship. The “Qualification” is a bridge between “Tour” and “Guide” table.
  • The “Stop” table contains details of the stop and one “Tour” can have many stopping place so 1:N relationship...

b.

Explanation of Solution

Crow’s Foot ER diagram for second LOST:

The following data model shows the solution for the given question.

Explanation:

  • In the above data model, “Tour” table contains details of the tour and the “Tour” can have many “Qualification” which equally “Guide” can works in many “Qualification”. Here the M:N relationship is break into two 1:N relationship. The “Qualification” is a bridge between “Tour” and “Guide” table...

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Students have asked these similar questions
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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