Management Information Systems (33:136:370:02) 
Fall 2015, Professor Eckstein
Assignment 2

Due: Thursday, September 24
 

For all questions, express your answers to 3 significant digits of precision and show your work.
 

Q1.  Compute the amount of storage needed for the following:

  1. A 20-page report with an average of 65 lines of text per page, and an average of 90 characters per line.  Express the result in binary-style KB.
  2. The COUNTY table from assignment 1, but containing information on 3,100 counties.  Assume that the ID number is a long integer (the default form for "autonumber" fields).  Express the result in binary-style KB.
  3. An 8.5-by-11-inch document scanned at 300 dots per inch (dpi), in 24-bit color.  Express you answer in binary-style MB.  
  4. 90 minutes of "1080p24" high- definition video: 1920 x 1080 pixels, 24 bits per pixel, and 24 frames per second (disregard any accompanying audio).  Express your answer in binary-style GB.
  5. An audio file containing of 60 minutes of music, with 2 channels, 48,000 samples per second, and 24 bits per sample.  Express your result in binary-style MB.  
     
Q2.  Compute the compression factors in the following situations:
  1. A single-layer "Blu-Ray" disc holds 25 binary GB of data.  What is the compression factor would be required for such a disk to hold the 90-minute video from Q1, part (d)?
  2. Suppose you use the MP3 algorithm to compress the audio file in Q1, part (e) to 12.1 binary-style MB.  What is the compression factor?