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A certain drug is tested for its effect on blood pressure. Seven male patients have their...

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Basic Math

A certain drug is tested for its effect on blood pressure. Sevenmale patients have their systolic blood pressure measured beforeand after receiving the drug with the results shown below (in mmHg).

                                   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 studyhypothesis (two-tailed).

b. (2) What test statistic(s) testwould you use?

c. (2) What is the critical value ofthe test statistic?

d. (3) If the value of the teststatistic is t = 2.67, what do you conclude (reject/do not rejectis not sufficient).

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