1. What happens when…  you eat spicy foods?

2. The “Scientific Method” and Experimental Design  Observations  Hypothesis Testing & Experimental Design Educated Guess Variables/Measures (Independent, Dependent) Experimental Groups  Data Analysis & Interpretation Graphing Statistics Conclusions  Future Experiments

3. Hot Salsa Experiment Time (min) Body TΔ Body T 00 3BT 3 -BT 0 6BT 6 -BT 0 9BT 9 -BT 0 12BT 12 -BT 0

4. Hot Salsa Experiment Max Δ BTMildHot S1S1 S2S2 S3S3 S4S4 S5S5 S6S6 S7S7 S8S8 S9S9 Mean =

5. Hot Salsa Experiment Statistical Analysis Student’ t-test for the comparison of two means: t = Y 2 – Y 1 / σ Y 2 -Y 1 = mean(group1)-mean(group2) standard error for both groups dƒ = n 1 +n 2 -2 σ Y 2 -Y 1 = √ ∑(Y 1i -Y 1 ) 2 + ∑(Y 2i -Y 2 ) 2 /n 1 +n 2 -2 Consult table to determine p value. If p < 0.05, then reject H 0.

6. Hot Salsa Experiment Take-Home Points Experiments do not prove anything. “Negative” results are valuable. Sample size affects experimental outcome. Controls are necessary. Statistics aid data interpretation.