Answer: hi your question is incomplete below is the complete question
answer:
The result has a statistical significance because from the results obtained from the sample of people whom followed vegetarian diet and the people whom followed non-vegetarian diet we can see the different effects on blood pressure.
The result has a practical significance because the large difference in mean values.
Explanation:
Sample size = 85 followed a vegetarian diet 
Period = 4 months, 
Mean systolic blood pressure= 124 mmHg
Sample size = 75 followed non-vegetarian diet 
Period = 4 months
Mean systolic Bp = 138 mmHg
Reasons/explanations 
Given that p -value < 0.01 we will reject the null hypothesis 
The result has a statistical significance because from the results obtained from the sample of people whom followed vegetarian diet and the people whom followed non-vegetarian diet we can see the different effects on blood pressure.
The result has a practical significance because the large difference in mean values.