Question

Question 14 A medical researcher is studying the effects of a drug on blood pressure. Type numbers in the boxes. Subjects in the study have their blood pressure taken at the beginning of the 10 points study. After being on the medication for 4 weeks, their blood pressure is taken again. The change in blood pressure is recorded and used in doing the hypothesis test. Change: Final Blood Pressure - Initial Blood Pressure The researcher wants to know if there is evidence that the drug affects blood pressure. At the end of 4 weeks, 32 subjects in the study had an average change in blood pressure of 2.5 with a standard deviation of 4.8. Find the p-value for the hypothesis test. Your answer should be rounded to 4 decimal places.

Answer 1

ud = null hypothesis: HO: Alternate Hypothesis: Ha: Ha 2.040 for 0.05 level with two tailed test and n-1= 31 degree of freedom, critical value of t= Decision rule: reject Ho if absolute value of test statistic t|>2.04 population mean sample mean sample size sample std deviation 2.5000 32.00 4.800 standard error of mean = Sx=s/vn= 0.8485 t = (x-1)/sx= test statistic p value 2.946 0.0061

from above p value =0.0061