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A researcher wishes to determine whether people with high blood pressure can reduce their blood pressure,...

A researcher wishes to determine whether people with high blood pressure can reduce
their blood pressure, measured in mm Hg, by following a particular diet. To test the claim, she conducts a controlled experiment with the following data:

     Treatment Group Control Group _
Sample mean 120.5 149.3
  Sample SD 17.4 30.2
Sample size 101 105

Use this data and a significance level of 0.01 to test the claim that the treatment group is from a population with a smaller mean than the control group.

Math   Statistics-And-Probability   
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