Sample difference of mean-hypothesis testing

Reference no: EM13113406

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.

Reference no: EM13113406

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