In a study of the effects of diet on blood pressure, one group of 85...

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In a study of the effects of diet on blood pressure, one group of 85 people followed a vegetarian diet for 4 months, after which time their mean systolic blood pressure was 15 mm Hg lower than at the start. Another group of 75 people followed a nonvegetarian diet for the same length of time, after which their mean systolic blood pressure was 1 mm Hg lower. If a vegetarian diet had no effect on blood pressure, there would be less than 1 chance in a 100 of getting these results. Which statement is valid based on these results?The result is not statistically significant.The difference in the sample size of the two groups makes a conclusion impossible.The recommended diet for lower blood pressure is nonvegetarian.The result is not practically significance.

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