Question

It was found from a research conduct by group of medical practitioners in a particular area that the mean pH of arterial plasma, also known as acidity of the blood is 7.4 for healthy adults. A new drug of arthritis has been developing. However it is thought that the drug may change blood pH. A random sample of 35 patients with arthritis took the drug for 2 month. After that their blood were tested to know the level of acid in their blood. At 5% level of significant, test the claim that the drug has change (either way) the mean pH level of blood. The random sample data collected are: 7.2 7.3 8 6.9 6.8 7.1 7.2 7 7.5 7.6 6.8 6.5 7.2 7.5 7.2 8.1 8.5 8.3 8.5 8.1 7.5 7.8 7.6 8.2 7.5 7.9 7.2 6.9 6.8 8.1 7.6 7.4 7.6 7.8 8.2

Answer 1