Then, using the criteria for considering an average value in measuring the satisfaction level of the sample group.According to the criteria from the wonchuang range is based on the formula as follows:
Then use criteria For the average to measure the satisfaction level of the sample on the basis of value. The rating is based on the Range Following formula:
Then use the criteria. For considering the average satisfaction level measurement of sample.Traditionally from the work to calculate the range of points. According to the formula as follows.