This test: 25 point(s) possible Question 17 of 25 Submit test This question: 1 point(s) possible In a randomized double-blind, placebo-controlled trial of children, an herb was tested as a treatment for upper respiratory infections in children. "Days of fever" was one criterion used to measure effects. Among 303 children treated with the herb, the mean number of days with fever was 0.79, with a standard deviation of 1.43 days. Among 366 children given a placebo, the mean number of days with fever was 0.61 with a standard deviation of 1.24 days. Use a 0.05 significance level to test the claim that the herb affects the number of days with fever. Based on these results, does the herb appear to be effective? Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Let population 1 be children treated with the herb. Identify the null and alternative hypotheses. OA. HO H1 # H2 OB. HO H1 = Hz OC. HO H1

H2 OF. HO: M1 - H2 H1:14

H2 The test statistic is (Round to two decimal places as needed.) The P-value is (Round to three decimal places as needed.) State the conclusion for the test. the null hypothesis. There sufficient evidence to support the claim that the herb affects the number of days with fever. Based on these results, the herb effective in changing the number of days of fever