Date: Fri, 14 Mar 2003 22:57:36 -0500 (EST)
From: Mark Alan Finlayson <markaf@mit.edu>
To: 6.050-students@mit.edu
Subject: [2.110/6.050] Problem Set #5 graded

Hi Class,

Problem set #5 has been graded.  The scores are as follows:

Average:                13.4
Std Dev:                1.6
Maximum:                17
Minimum:                9
Full Credit Score:      17
Maximum Possible:       18

Grading notes: I gave a point of extra credit for extra issues discovered
concerning the web protocol.  Furthermore, if students calculated the
Huffman code correctly for 2(e), they were given credit, even if they did
not get the final answer (yes/no) correct.

Content note: Most students did not get Problem 2(a,c,d) correct, that is,
calculating the channel capacity of the noisy, non-symmetric channel
between the customers and cooks.  The proper equation to use is (6.25)
from the course notes.  Most students assumed that the channel was
symmetric and used equation (6.26).  But a symmetric channel means that
Burgers and Zucchini have the same probability, and in this formulation
they do not: P(B) = 0.9 and P(Z) = 0.1.

Mark


--------------
Mark Finlayson
Teaching Assistant for 2.110J/6.050J
office: 38-344c
email:  markaf@mit.edu
phone:  617.452.2845
mobile: 617.515.0708