University:
Missouri State University
Course:
MTH 343 | Foundations of Probability and Statistics for Teachers
Academic year:

2021
Views:

472

Pages:

11
Author:

Dania Lynch

Comparing TWO Proportions! Bi Prppr? PART 2 Prp Prp Prp + Pi-Pa Chapter 221 CI formula for the difference in proportions! RECALL!... + Pi-Pa 1-prop η 2-props. (diffs) Z= P-Po Po 20 n estimate of p Z= Pi-es-pooled STATISTICS FREE-RESPONSE QUESTIONS 4. A researcher conducted a medical study to investigate whether taking a low-dose aspirin reduces the chance of developing colon cancer. As part of the study, 1,000 adult volunteers were randomly assigned to one of two groups. Half of the volunteers were assigned to the experimental group that took a low-dose aspirin cach day, and the other half were assigned to the control group that took a placebo cach day. At the end of six years, 15 of the people who took the low-dose aspirin had developed colon cancer and 26 of the people who took the placebo had developed colon cancer. At the significance level = 0.05, do the data provide convincing statistical evidence that taking a low-dose aspirin each day would reduce the chance of developing colon cancer among all people similar to the volunteers? 2 prop 2-test Difference test for PROPORTIONS!! ALWAYS assume no difference!! Ho: pi=pa (P1-P2=0) You try to prove the alternative, Which is either: Hai Pipa (you should get a POS 2) Ha: Pipa (you should get a NEG 2) Ha: PiPa (you'll get either!)