A Researcher Wishes to Test Whether a Particular Diet Has

Essay

A researcher wishes to test whether a particular diet has an effect on blood pressure. The blood pressure of 25
randomly selected adults is measured. After one month on the diet, each person's blood pressure is again
measured. For 19 people, the second blood pressure reading was lower than the first, and for 6 people, the
second blood pressure reading was higher than the first. At the 0.01 significance level, test the claim that the diet
has an effect on blood pressure.