<p>The data for this experiment came from a student named David Merrell,
who collected them as part of a high school science project.</p>

<p>Merrell raised three groups of mice. 
<ul>
  <li>Group 1 was raised in the absence of music
  <li>Group 2 heard 10-12 hours of Mozart every day
  <li>Group 3 heard 10-12 hours of rock music (performed by the group
      Anthrax) every day
</ul>
They were originally taught  to navigate a maze 
for food, and then were placed back in the maze each
week and the time to run the maze was collected. (Actually there were
three trials each week, and the data file 
gives those three times). <br>
Included are also the mean and
the median running time per week. <br>
Finally, the weights of each mouse
when they were received from the 
breeding lab and at each of the four weeks of testing (wt0 to wt4) are 
included.</p>