Answered: PROBLEM 2 Professor Weejohs teaches two…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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PROBLEM 2 Professor Weejohs teaches two sections of business analytics, which combined will result in 120 final exams to be graded. Professor Weejohs has two assistants, AJ and Romel, who will grade the final exams. There is a 3-day period between the time the exam is administered and when final grades must be posted. During this period AJ has 12 hours available and Romel has 10 hours available to grade the exams. It takes AJ an average of 7.2 minutes to grade an exam, and it takes Romel 12 minutes to grade an exam; however, AJ’s exams will have errors that will require Professor Weejohs to ultimately regrade 10% of the exams, while only 6% of Romel’s exams will require regrading. Professor Weejohs wants to know how many exams to assign to each assistant to grade in order to minimize the number of exams to regrade. Required: a. Solve this model by using Solver in MS Excel. Generate the (1) answer and (2) sensitivity reports for this model. b. If Professor Weejohs could hire AJ or Romel to work 1 additional hour, which should he choose? What would be the effect of hiring the selected assistant for 1 additional hour?

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