#1 Echinacea Cold Treatment Group No Cold Cold Total Echinacea 4 44 48 Placebo 15 88 103 a Treatment Risk = pl-hat b) Control Risk = p2-hat C RR-hat = d) Association is Positive or Negative?: d) Percetage compared to Baseline e) Above or Below? f) 95% Confidence Level RR LCL UCL Risk Ratio g Significant at the 5% Significance Level? ConclusionProblem #1: Echinacea Cold Treatment (Two Sample Proportions Testing) Echinacea is a widely used herbal supplement to ward off the common cold. Does it work? In a double-blind experiment, healthy volunteers were exposed to the common cold virus. The volunteers were randomly assigned to take either Echinacea or a Placebo daily for 5 days. Refer to the Excel template for the tabulated results a.) What is the Risk of No Cold associated with Echinacea (P ); What is the Risk for the Placebo (P,)? b.) What is the Relative Risk, RR? c.) What is the Association? d.) What is the Percentage Above or Below the Baseline? e.) Using OpenEpi.com, find the 95% Confidence Interval f.) At a Significance Level of 0.05, is there a significance difference? (is "1" inside or outside the CI?)