Question
In: Math
A certain drug is tested for its effect on blood pressure. Seven male patients have their...
A certain drug is tested for its effect on blood pressure. Seven male patients have their systolic blood pressure measured before and after receiving the drug with the results shown below (in mm Hg).
Patient SBP before SBP after
1 120 125
2 124 126
3 130 138
4 118 117
5 140 143
6 128 128
7 140 146
a. (2) State, in prose, the study hypothesis (two-tailed).
b. (2) What test statistic(s) test would you use?
c. (2) What is the critical value of the test statistic?
d. (3) If the value of the test statistic is t = 2.67, what do you conclude (reject/do not reject is not sufficient).
Solutions
Expert Solution
Let us denote the difference
d = SBP before - SBP after
To test whether drug reduced the blood pressure,
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