This lesson teaches students how to apply quantitative methods to an experiment. Student’s T-Test Background Info introduces students to statistical hypothesis testing, alternative hypothesis, null hypothesis, and t-tests. After students learn about t-tests, they view the Bacteria Quantitative Experiment. This experiment compares the growth of bacteria on agar plates swabbed from hands that weren’t cleaned, and cleaned with hand sanitizer, regular soap, and antibacterial soap. There are pictures