Chapter 4, Problem 4.16P

At St. Algebra College, the math department ran some special sections of the freshman math course using a variety of innovative teaching techniques. Students were randomly assigned to either the traditional sections or the experimental sections, and all students were given the same final exam. The results of the final are summarized course?

Traditional	Experimental
$\bar{X}=77.8$	$\bar{X}=76.8$
$s=12.3$	$s=6.2$
$N=478$	$N=465$