1. Define confidence interval and discuss its statistical relevance. 2. Compare and contrast standard error and margin of error 3. Post a URL of your favorite youtube video on confidence intervals. In a brief paragraph discuss why it was helpful in your understanding. 4. Sullivan Chapter 6 Practice problem pg 120 #1 answer (173.8, 218.4) Show all hand calculations. Points deducted for not showing all steps in calculations. 5. Sullivan Excel workbook Chpt 6 pg 87 #1 (pg 77 for Mac version) 6. Sullivan Excel workbook Chpt 6 pg 87 #2 (pg 77 for Mac version) 7. Sullivan Excel workbook Chpt 6 87 #3 (pg 77 for Mac version) #3 Problem set up hint below. Determine difference in proportions (subtract placebo group from experimental, E3-E2 so you don’t get a negative number) then use z score to calculate upper and lower 95% limits. Hypertensive Not Hypertensive Total Proportion Experimental 14 86 100 0.14 Placebo 22 78 100 Difference in Proportions Subtract E3-E2 Z NORM.S.INV(0.975) Upper 95% limit Refer to formula in Figure in Excel workbook Lower 95% limit Answer: Must use formula for full credit.
