Table 2.

Comparison of pre- and posttest student results

Questions	Pretest average(n = 138)	Posttest average(n = 75)	Significant difference
1. What is a microarray?	0.14	0.84	p = 1 × 10−9
2. Describe one use of a microarray.	0.24	1.15	p = 3 × 10−14
3. Analysis of microarray experimental results	0.24	1.31	p= 4 × 10−24
4. Place steps of microarray procedure in order (multiple correct answers).	0.36	1.48	p = 3 × 10−20
Totals (8 possible points)	0.98a	4.78a	p = 2 × 10−26

^a 8.2% correct.

^b 59.8% correct.