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Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 45 of the 52 subjects treated with echinacea developed thinovirus infections. In a placebo group, 86 of the 103 subjects developed rhinovirus infections. Use a 0.01 significance level to test the claim that echinacea has an effect on rhinovirus infections. Complete parts (a) through (c) below a Test the claim using a hypothesis test. Consider the first sample to be the sample of subjects treated with echinaces and the second sample to be the sample of subjects treated with a placebo. What are the null and alternative hypotheses for the hypothesis test? OA Hg: Py "Pz H₁: P1 P₂ OD. Hy: Py RP₂ H₁ Py P₂ Identify the test statistic (Round to two decimal places as needed) Identify the P-value P-value= (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? The D the innifinanra n OB. Ho P₁ P₂ H₁ P1 P₂ OE Hg Pq SP₂ H₁: P P₂ the nid hunnerie There OC. M: P₁ P₂ H₁: Pt "Py P₂ OF Hg: P H₂: Py #P₂ Time Remaininu: 02:26:35
What is the conclusion based on the hypothesis best? the significance level of a 0.01, so b. Test the claim by constructing an appropriate confidence interval. The 99% confidence intervalin (P₁-P₂) (Round to three decimal places as needed.) What is the conclusion based on the confidence interval? Because the confidence interval limits has an effect c. Based on the results, does echinacea appear to have any effect on the infection rate? The P-value is 0, there the null hypothesis. There sufficient evidence to support the claim that echinacea treatment has an effect. appear to be a significant difference between the two proportions. There OA Echinacea does appear to have a significant effect on the infection rate. There is evidence that it increases the infection rate OB. Echinacea does not appear to have a significant effect on the infection rate. OC. Echinacea does appear to have a significant effect on the infection rate. There is evidence that it lowers the infection rate. OD. The results are inconclusive. evidence to support the claim that echinacea treatment
Heights (cm) and weights (kg) are measured for 100 randomly selected adult males, and range from heights of 133 to 192 cm and weights of 38 to 150 kg. Let the predictor variable x be the first variable given. The 100 paired measurements yield x 167 40 cm, y 81.44 kg, r0.317, P-value 0.001, and y-1021.01x. Find the best predicted value of y (weight) given an adult male who is 177 cm tall. Use a 0.10 significance level. The best predicted value of y for an adult male who is 177 cm tallis (Round to two decimal places as needed.) kg.