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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