Question 24. Hypertension (high blood pressure) is a well known risk factor of m

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Question 24. Hypertension (high blood pressure) is a well known risk factor of myocardial infarction (heart attack) Traditionally the diagnosis and treatment of hypertension is done by simply recording blood pressure in the physician's office. cardiologists favor ambulatory blood pressure monitoring, which allows recording of the patient's blood pressure while they go about their daily routines. The following plots and statisties describes a study in which more than 400 male patients wore monitors to obtain average ambulatory blood pressur (Average.ASBP) which could then be compared agains (Office.SBP). However, a one-time measure in the doctor's office may not be the best indicator of risk. Many t blood pressure measured in the doctor's office (A) How many men, exactly, were part of this study? (B) Write out the null and alternate hypothesis? (C) Which kind of statistical test is the best to evaluate the hypothesis (circle the correct answer)? A·One, "av-ANOVA B. Correlation C. Partial correlation D. Simple linear regression. E. None of the above (D) Do you reject the null hypothesis (circle)? Yes (E) For the best statistical test of the null hypothesis, write the values for the test statistic, the degrees of freedom, and the p-value.

Explanation / Answer

(A)

in the test result, there is 471(n-2) DF. Where n is total sample size.

so, n=473 which is exactly man participant in a test.

(B)

Ho: True correlation between hypertension and risk of heart attack is equal to Zero. OR rho=0

Ho: True correlation between hypertension and risk of heart attack is not equal to Zero. OR rho not equal to 0

(c)

test for correlation is the best to test for given data.

(d)

yes, a p-value <0.05, Hence we reject the null hypothesis.

(e)

the best test for the statistical test is Pearson's product moments.

t-statistics value= 19.0547

df=471

pvalue<2.2e-16

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