Discussion:
Q: A reasearcher wishes to determine whether people with high blood pressure can reduce their blood pressure by following a particular diet. Use the sample data below to test the claim that the treatment population mean is smaller than the control population.
Treatment group
n=90
sample average (x-bar)=168.1
sample standard deviation= 28.7
Control group
n=75
sample average(x-bar)=185.7
sample standard deviation=9.2
a. formulate the hypothesis
b.test the hypothesis and draw a conclusion show work giving critical and test values of z and state your conclusion.