Mathematics, 14.12.2019 06:31 frizzy52

Aresearcher wishes to determine whether people with high blood pressure can reduce their blood pressure by following a particular diet. subjects were randomly assigned to either a treatment group (the diet) or a control group (no diet).the mean blood pressure was determined for each group, and a 95% confidence interval for the difference in the means for the treatment group versus the control group, ? t - ? c, was found to be (-21, -6).

the probability that the mean blood pressure for those on the diet is lower than for those not on the diet is0.95.

a. we are 95% confident that the average blood pressure of those who follow the diet is between 6 and 21points higher than the average for those who do not follow the diet.
b. we are 95% confident that the average blood pressure of those who follow the diet is between 6 and 21points lower than the average for those who do not follow the diet.
c. since all of the values in the confidence interval are less than 0, we are unable to conclude that there is a difference in blood pressure for those who follow the diet and those who do not.

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