1.A researcher compared four different techniques to lower blood pressure of individuals diagnosed with high blood pressure.The subjects were randomly assigned to four groups and each followed a specified treatment.After eight weeks, the reduction in each person's blood pressure was recorded.

Figure 1 Minitab Output

Minitab output

a)Do different treatments lower blood pressure better than others at a 0.05 significance level? Conduct the hypothesis test by filling in the blanks:

a.________________________________

:________________________________

b.________

c.Test Statistic: _____________________

Check assumptions:

d.Value of the test statistic: ___________

e.p-value: _______________

f.Decision:______________

g.Conclusion in context of the problem: ______________________________________________________________________________________________________________________________________________________

(b) What does the confidence interval graph suggest about the difference in techniques to lower blood pressure?