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The results of the blood pressure measurements taken of the same patient by fourteen different second-year medical students are listed in the table below.

                         Systolic        Diastolic

                            138              82

                            130              91

                            135              100

                            140              100

                            120              80

                            125              90

                            120              80

                            130              80

                            130              80

                            144              98

                            143              105

                            140              85

                            130              70

                            150              100

a. Use a 5% level of significance to test whether there is a significant linear correlation between the two variables {use hypothesis test for the slope}

b. For a given systolic blood pressure of 125, identify the 95% prediction interval estimate for the slope (diastolic blood pressure). Write a statement interpreting your interval in the context of this example.

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