Math 143 F
Probability and Statistics
Spring 2000

Survey 3 Says...

Here is the data from Math 143F, Spring 2000, on two questions from Survey 3.

The Survey Set-Up

I prepared two versions of Survey 3, and on the second class day I systematically gave alternate students different versions. Without knowing that there were two versions, the students were told to fill in the survey without discussing the questions with others in the class. There were 32 students in class, 16 had each version of the survey.

The Results

The results for each of the two versions are listed below.
1a. What is your favorite color?


____ red	____ green	____ purple	____ other: __________


1b. What is your favorite color?

			red 	green	purple	blue	yellow	orange	black
	version a	 2	 3 	  4	 5	  1	  1	  0
	version b	 1	 1	  1	 7	  1	  1	  4



2a. What is your favorite zoo animal?

	All 16 listed something other than a lion, giraffe or elephant


2b. What is your favorite zoo animal?


__5_ lion	__1_ giraffe	__2_ elephant	__8_ other: __________



3a. How many hours of TV do you watch in a typical week?


__5_ under 2	__7_ 2-4 	__3_ 5-7 	__0_ 8-10	__1_ more


3b. How many hours of TV do you watch in a typical week?


__9_ 0-4	__3_ 5-10 	__4_ 10-15	__0_ 15-20	__0_ more


Comments:
--------
The data from 3a can (almost) be converted to the 3b format.  If we assume
that the one student who checked more in version a actually watched
10-15 hours of TV (likely, given the other data), the result is 
the following:

                         0-4    5-10    10-15    15-20    more
        version a         12      3         1        0       0	
        version b          9      3         4        0       0

Notice how the responses to version a tend to be somewhat lower.

More dramatic results could perhaps be obtained using ranges that are a 
little lower.  Very few of my students claim to wath more than 10 hours per
week.


4a. Do you agree that Calvin College should allow January Series speakers to 
express opinions even if they are not held by Calvin College?


		_15_ Yes 		__1_ No


4b. Do you agree that Calvin Calvin should forbid January Series speakers from 
expressing opinions that are not held by the College?


		__0_ Yes 		_16_ No


Not much effect this time.

This page maintained by:
Randall Pruim
Department of Mathematics and Statistics
Calvin College
rpruim@calvin.edu

Last Modified: Thursday, 11-Jan-2001 16:02:47 EST