A pharmaceutical company has developed a new drug that is believed to reduce blood pressure more effectively than the existing treatment. To test the effectiveness of the new drug, a random sample of 50 patients with high blood pressure was selected. After taking the new drug for a month, the mean reduction in blood pressure for these patients was found to be 8.5 mm Hg with a standard deviation of 3.2 mm Hg. The company claims that the new drug reduces blood pressure by more than 7 mm Hg. Test this claim at the 5% level of significance.

A trial in people with high blood pressure compared a new intervention, drug x, to current best practice.  The primary outcome was myocardial infarction (heart attack)  After 12 months the risk ratio for myocardial infarction in the intervention group was 0.7.The results were presented as RR 0.7, 95%CI 0.65 to 0.75.Select the best interpretation of this result.Question 7Answera.Participants receiving drug x were less likely to have a heart attack than those on usual care and the result was significant.b.Participants in the usual care group were less likely to have a heart attack than those receiving drug x but the result was not significant.c.Participants receiving drug x were less likely to have a heart attack than those on usual care but the result was not significant.d.Participants in the usual care group were less likely to have a heart attack than those receiving drug x and the result was significant.

Studying the impact of a new medication on the blood pressure of patients with hypertension is an example of dependent variable.Group of answer choicesTrueFalse

To study the effect of soothing music on a person's blood pressure, a random sample of 440 adults were randomly assigned into two groups each of size 220. Sample 1 (group 1) listened to soothing music for 5 minutes prior to having their blood pressure taken, while sample (group 2) sat in silence. The mean and standard deviation of the systolic blood pressure from sample 1 was 114.5 and 39.18 respectively. The mean and standard deviation of the systolic blood pressure from sample 2 was 122.8 and 39.18 respectively. Suppose we want to test, at the 1% level of significance whether soothing music significantly lowers systolic blood pressure. Let μ1 denote the mean systolic blood pressure for adults after listening to soothing music and let μ2 denote the the mean systolic blood pressure for adults after sitting in silence. State the null and alternative hypothesis for this test?Question 4Select one:a.H0:μ1−μ2=0 vs Ha:μ1−μ2>0𝐻0:𝜇1−𝜇2=0 vs 𝐻𝑎:𝜇1−𝜇2>0 b.H0:μ1−μ2=1 vs Ha:μ1−μ2<1𝐻0:𝜇1−𝜇2=1 vs 𝐻𝑎:𝜇1−𝜇2<1 c.H0:μ1−μ2=0 vs Ha:μ1−μ2≠0𝐻0:𝜇1−𝜇2=0 vs 𝐻𝑎:𝜇1−𝜇2≠0 d.H0:μ1−μ2=0 vs Ha:μ1−μ2<0

Which of the following is a good indicator for a program that aims to decrease blood pressure in Stage 1 and Stage 2 hypertension patients?The percentage of patients having stage I and II hypertension received medicinesThe proportion of patients enrolled who are retained at 12 months and are happy with their careThe mean systolic blood pressure of patients having stage I and II hypertension patientsThe proportion of patients having stage I and II hypertension among all patients

Research Question: What is the combined effect of medication and diet on blood pressure in adult males?A randomized, controlled experiment investigated this question using a random sample of 540 adult males as subjects. At the beginning of the study, researchers measured the blood pressure of all the subjects. Each subject was given a month's supply of either Drug A, Drug B, or a placebo, then was assigned to be on either a low-fat diet or a low-salt diet for that month-long period. At the end of the month, the researchers measured the blood pressure of each subject again, and compared the two blood pressure readings.How many different groups are there altogether in this study? 2 3 4 5 6Question 2Select all that apply.10 pointsResearch Question: What is the combined effect of fertilizer and watering on cherry tomato plants?Planters were built that each contained 10 cherry tomato plants. Each planter was identical except that it received a different treatment of water and fertilizer than the other planters. Treatments consisted of a combination of one of four watering schedules and one of three fertilizer concentrations. The plants were tended according to these treatments and after 65 days the average number and weight of the tomatoes per plant were measured for each treatment group.Which of the following is an explanatory variable in this study? Check all that apply. Fertilizer schedule Number of days of treatment Number of plants per planter Number of tomatoes per plant Watering scheduleQuestion 3Select one answer.10 pointsA simple random sample of 1,240 adult Americans is selected, and each person is asked the following question:In light of candidate Jones’s alleged criminal activity do you believe he should withdraw from the race?67% of those surveyed agreed that he should withdraw. Which of the following is an appropriate conclusion about the results? They are reasonably accurate because the study used a large simple random sample. They probably overstate the percentage of people who favor his withdrawal because of the question’s wording. They are inaccurate because of convenience sampling. They are inaccurate because of voluntary response. They probably understate the percentage of people who favor his withdrawal because of the question’s wording.Question 4Select one answer.10 pointsWhich of the following best describes the method of randomized response? A method in which subjects answer the questions in a survey in a random order A sampling method A technique used to minimize the bias in the responses of subjects to sensitive questions A method in which subjects answer each of the