1.A school experiments with two teaching approaches for mathematics.In one class room the material is taught using lectures only.In the other classroom lectures are mixed in with the use of manipulatives, computers, and collaborative activities.Do the data below support the claim that students in the classroom with multiple techniques do better. (a=.05)

Lecturen = 20=76.0s = 2.1

Multiplen = 32= 88.5s = 0.4