Rhino viruses typically cause common colds. In a test of theeffectiveness of​ echinacea, 38 of the 45 subjects treated withechinacea developed rhinovirus infections. In a placebo​ group, 87of the 101 subjects developed rhinovirus infections. Use a 0.05significance level to test the claim that echinacea has an effecton rhinovirus infections. Complete parts​ (a) through​ (c)below.
Identify the test statistic.:
Z equals negative 0.27 ​(Round to two decimal places as​needed.)
Identify the​ P-value. ​:
P-value equals 0.788 ​(Round to three decimal places as​needed.)
What is the conclusion based on the hypothesis​ test? The​P-value is greater than the significance level of a= 0.05​, so failto reject the null hypothesis. There is not sufficient evidence tosupport the claim that echinacea treatment has an effect. :
b. Test the claim by constructing an appropriate confidenceinterval.
The 95​% confidence interval is nothing less than leftparenthesis p 1 minus p 2 right parenthesis less than nothing.:
___<(P1-P2)>___ ?
So what does P1 and P2 equal?
