Also available:
The Resampling Stats Intelligent Tutor
With the RESAMPLING STATS Intelligent Tutor, students learn
resampling on their own, writing programs to solve problems and
correcting them in response to comments from the tutor. For
example, the tutor poses the problem
"What is the probability that a process that has a 30% probability
of producing a 'first-class' computer chip will produce a sample of
500 with 180 or more 'first-class' chips?"
Suppose a student tries this (erroneous) program:
REPEAT 1000 'do 100 trials
GENERATE 180 1,10 a 'generate 180 "chips", represented
'by random numbers between 1 and 10
COUNT a <=3 b 'count the 'first class' chips
SCORE b z 'score the result
END 'end the repeat loop
COUNT z >= 180 k 'how often 180 or more 'first
'class'?
PRINT k 'Print the result
ANSWER "problem1" k 'the answer is in vector k
'(this command asks the tutor to
'check the answer)
The RESAMPLING STATS Intelligent Tutor will analyze the
program, determine whether the answer is within a reasonable range,
and check for errors in the logic. In this case, the Tutor will
produce a message that the sample size specified in the GENERATE
command (180) does not match the sample size required by the problem
statement (500). The student can correct this line in the program,
and try it again. The Intelligent Tutor will again check the
result, and so on.
This first edition of the RESAMPLING STATS Intelligent Tutor
requires RESAMPLING STATS IBM version 3.14 to run, and comes with a
set of four problems. (Currently the tutor's application is limited
to binomial problems, and confidence interval problems with a single
sample of measured continuous data.) Because we are eager to learn
how others use this exciting new teaching tool, we are offering it
free of charge to any purchaser of RESAMPLING STATS and who
completes a written evaluation form after using the package.
To get your RESAMPLING STATS Intelligent Tutor, just write
"send free tutor" on your order form, or send a self-addressed,
stamped envelope to:
RESAMPLING STATS
612 N. Jackson St.
Arlington, VA 22201
Phone: 703-522-2713 Fax: 703-522-5846
email: pcbruce@wam.umd.edu