Suppose patients were recruited into a clinical trial from three different clinical sites. Use the following data to test for differences in the proportion of hypertensive patients across the three sites.

	Site 1	Site 2	Site 3
Hypertensive	10	14	12
Not Hypertensive	68	56	40

What is the appropriate test statistic to use?

Test the hypothesis under 5% significance level?(Show your work of analysis and conclusion for full credits)