And confidence by the experiment with a population that looks similar to the example study group. Number 30, and analyzed by the formula of coefficient Alpha Rho naba c. The confidence value equals 0.726
And for the confidence The experiment on the population of a similar sample of 30 patients and analyzed with Cronbach's alpha coefficients. The confidence value equal to 0.726.
The reliability. By the experiment with the similar sampling study of 30 cases and the analysis by using Cronbach's alpha coefficient. Reliability of 0.726.