AP Statistics / Unit 4: Inference for Quantitative Data: Means
4.9 Setting Up a Test for the Difference Between Two Population Means
Notes
- $H_0:\mu_1-\mu_2=0$; $H_a$ uses $>$, $<$ or $\ne$.
- Decide: two independent groups (two-sample $t$) or paired (one-sample $t$ on differences)?
Practice
Twins are split: one gets a new diet, one doesn't. Which test?
Each twin pair is matched.
Comparing mean scores of two different classes uses:
Independent groups.
$H_0$ for comparing two means:
Parameters.
Ready for more? Take the Unit 4 test.