CS5014: Homework 8

Due Friday, 20 October

Please turn in a hardcopy of the solution to this homework, written using LaTeX. You may not receive full credit if you do not staple together the pages of your homework.

1. The table below contains measurements of the execution time of a program to solve a linear system of equations with 1000 unknowns. The one factor is the computer model.

   Computer model		execution times from 3 trials
   =====================================================
   Fujitsu AP 1000		   1.01	   1.48	   1.02
   Intel Delta		  22.00	  21.00	  23.05
   nCUBE/2			 321.09	 331.99	 340.00
   Parsytec FT-400		1075.99	1048.39	2000.01
   

   1. Does factor "computer model" have a significant effect on execution time at level 0.1, based on the F test?

   2. Is each level of factor "computer model" significant, based on confidence interval at a 90% confidence level?

2. Do exercise 21.1 in Jain.