Experimental Design Errors
1. An experiment was designed to see what effects ibuprofen would have on laboratory
mice. Large numbers of male mice and an equal number of female mice were used
in this investigation. The male mice were placed in an area with food and water. The
female mice were placed in a separate area of the same size. The female mice were
given additional food and water. The males were each given 100 milligrams of
ibuprofen each day, mixed with their food, and the females were each given 50
milligrams of ibuprofen each day, mixed with their food. Identify two errors in the
design of this investigation.