# Question: A study was conducted to evaluate the effectiveness of an

A study was conducted to evaluate the effectiveness of an antihypertensive product. Three groups of 20 rats each were randomly selected from a strain of hypertensive rats. The 20 rats in the first group were treated with a low dose of an antihypertensive product, the second group with a higher dose of the same product, and the third group with an inert control. The amounts of decrease in systolic blood pressure 30 minutes after the rats receive an injection are given in the following table. Note that negative values represent increases in blood pressure.

a. Compare the mean drops in blood pressure for the high-dose group and the control group. Use α = .05 and report the level of significance.

b. Estimate the size of the difference in the mean drops for the high-dose and control groups using a 95% confidence interval.

c. Do the conditions required for the statistical techniques used in parts (a) and (b) appear to be satisfied? Justify your answer.

a. Compare the mean drops in blood pressure for the high-dose group and the control group. Use α = .05 and report the level of significance.

b. Estimate the size of the difference in the mean drops for the high-dose and control groups using a 95% confidence interval.

c. Do the conditions required for the statistical techniques used in parts (a) and (b) appear to be satisfied? Justify your answer.

## Answer to relevant Questions

Refer to Exercise 6.50. a. Compare the mean drops in blood pressure for the low-dose group and the control group. Use α = .05 and report the level of significance. b. Estimate the size of the difference in the mean drops ...Refer to Exercise 6.55. In exercise a. To what populations are the conclusions obtained in Exercise 6.55 relevant? b. A more precise estimate of the mean expenditure for female candidates is requested. How many female ...Refer to the epilepsy study data in Table 3.19. Use the data for the number of seizures after 8 weeks for the placebo patients and for the patients treated with the drug progabide to answer the following questions. a. Do ...The number of households currently receiving a daily newspaper has decreased over the last 10 years, and many people state they obtain information about current events through television news and the Internet. To test ...The SAT Reasoning Test is an exam taken by most high school students as part of their college admission requirements. A proposal has been made to alter the exam by having the students take the exam on a computer. The exam ...Post your question