Discussion:
Q: Sample data were collected in a study of calcium supplements and their effects on blood pressure. A placebo group and a calcium group began the study with blood pressure measurement. At the 0.05 significance level, test the claim that tin two sample groups come form populations with the same mean.
Placebo 124.6 104.8 96.5 116.3 106.1 128.8 107.2 123.1 118.1 108.5
120.4 122.5 113.6 ,
Calcium 132.1 105.7 120.1 116.7 123.9 107.4 119.3 110.6 129.7 110.0
127.3 109.6 124.4 115.2 126.4