Salt-free diets are often prescribed to people with high bloodpressure. The following data values were obtained from anexperiment designed to estimate the reduction in diastolic bloodpres- sure as a result of consuming a salt-free diet for 2 weeks.Assume diastolic readings to be normally distributed.
(a) Calculate a 90% confidence interval for the meanreduction.
(b) Is there evidence that diastolic blood pressure is reduced byhaving salt-free diets, use α = 0.05.
Patients A. B. C. Â Â D. E. F. G. H
Before. 93. Â Â 106 87 92 102 95 88 110
After. 92. 102 89 92 101 96 88 105
