Question 5 (1 point) Which of the following statements is/are true? 1. If the confidence interval for the difference of two sample proportions contains 0, we can conclude that the difference between the groups is significant. 2. In conducting an independent test of significance, population data is used (analyzed) to infer if a true difference exists between the samples. 0 A) Statement 2 only 0 B) Statement 1 and 2 O C) I need more information to answer this 0 D) Neither of the two statements 0 E) Statement 1 only Previous Page Next Page Page 5 Of 11 Question 4 (1 point) Conducting a test of significance with 0( = 0.05, we wish to determine whether there is a significant difference between the proportion of deaths due to lung cancer in the general population of chemical plant workers (group 1) and the proportion of deaths due to lung cancer for those working in a new chemical plant (group 2). Suppose the estimated proportion of deaths due to lung cancer in group 1 is 12.8% (out of n1 = 250), and that out of 100 deaths that occurred in a new chemical plant, 22 were found to be attributed to lung cancer. The hypotheses for this test are Ho: p1p2 = 0 vs. HA: Pl'Pz a: 0. What is the SE for the difference in proportions? Q A) 0.0465 0 B) 0.0004 0 C) 0.0022 Q D) 0.0017 0 E) 0.2037 Previnu: Page Next Page D209 A nf 1 1 Question 1 (1 point) In 2016, thousands of Americans became HIV positive through drug injection [Source: https://www.avert.org/professionals/hiv-around-world/western-central-europe-north-america/usa]. Suppose we have the following breakdown of patients diagnosed with HIV related to drug use. Using the sample data below, conduct a test of significance (at 5% level of significance) to verify if the proportion of HIV-positive Caucasians is greater than that of the Hispanic group. Ethnicity Sample size (n) Proportion infected through injection Caucasian (or C) 70 0.41 O Hispanic (or H) 65 0.23 What would be your decision? ( A) Fail to reject Ho since p-value > 0.05 ( B) Fail to reject Ho since p-value