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

1. Do different treatments lower blood pressure better than others at a 0.05 significance level? Conduct the hypothesis test by filling in the blanks:
2. H0:________________________________

Ha:________________________________

1. =________
2. Test Statistic: _____________________