Description: A researcher wanted to find the effect of a special diet on the systolic blood pressure of high blood patients. She selected a sample of 7 adults in placed them on a dietary plan for 2 months. Use a 5% level of significance to test that there is a significant difference between before and after. The following data were recorded: Table 1. Systolic blood pressure of patients before and after the diet Patient A В C D E F G ВР 210 180 190 220 230 210 220 (BEFORE) ВР 190 150 170 180 150 160 170 (AFTER)

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