7. [6 marks] a. [3 marks] Explain carefully including diagrams what the p-value is and what it represents. Include why we can conclude the null hypothesis can be rejected if the p-value is small. b. [3 marks] Read the following abstract and identify the conclusion of the several listed that has the strongest evidence supporting it. Background -Evidence consistently shows that almond consumption beneficially affects lipids and lipoproteins. Almonds, however, have not been evaluated in a controlled-feeding setting using a diet design with only a single, calorie-matched food substitution to assess their specific effects on cardiometabolic risk factors. Methods and Results-In a randomized, 2-period (6 week/period), crossover, controlled-feeding study of 48 individuals with elevated LDL-C (14913 mg/dL), a cholesterol-lowering diet with almonds (1.5 oz. of almonds/day) was compared to an identical diet with an isocaloric muffin substitution (no almonds/day). Differences in the nutrient profiles of the control (58% CHO, 15% PRO, 26% total fat) and almond (51% CHO, 16% PRO, 32% total fat) diets were due to nutrients inherent to each snack; diets did not differ in saturated fat or cholesterol. The almond diet, compared with the control diet, decreased non-HDL-C (-6.912.4 mg/dL; P=0.01) and LDL-C (-5.3+1:9 mg/dL; P=0.01); furthermore, the control diet decreased HDL-C (-1.710.6 mg/dL