Reference no: EM132152271

You test a now drug to reduce blood pressure. A group of 15 patients with high blood pressure report the following systolic pressures (measured in mm Hg):

before medication: 187 120 151 143 160 168 181 197 133 128 130 195 130 147 193 (y)-157.53 (s)-27.409

after medication: 187 118 147 145 158 166 177 196 134 124 133 196 130 146 189 (y)-156.40 (s)-27.060

change: 0 2 4 -2 2 2 4 1 -1 4 -3 -1 0 1 4 (y)-1.133 (s)-2.295

a) Calculate a 90% CI for the change in blood pressure.

b) Calculate a 99% CI for the change in blood pressure.

c) Does either interval (the one you calculated in (a) or (b)) include 0? Why is this important?

d) By conducting a one sample t-test using μ = 0, and α = .10. Are the results consistent with (a)?

e) Finally, by conducting a one sample t-test using μ = 0, and α = .01. Are the results consistent with (b)?