This research can be categorized as descriptive survey research. The study population consisted of members
of web site that have been purchase form web sites at least one time. The study is used of
available random sampling. So that during the time of completing this research the questionnaire was
distributed to online Members. Sample size based on Cochran formula and the accuracy of estimate of 0.087
that achieved from sample, and the error of α ═ 0.0 5 was 127.
The data gathering instrument was a self administered questionnaire. All the items were measured using five-
point Likert scale items with anchor points 1 = strongly disagree and 5 = strongly agree. To analyze the
hypotheses of the study, one-sample τ-test has been used. To test the reliability of data gathering instrument, a
preliminary study has been conducted with a sample of 30. The results of the primary sample show that
Cronbach alpha (α) index is 0.84 that indicate a good reliability. Also for testing the existence of linear
relations between variables, P.correlation was used. In this research we used Structural Equation Model
(SEM) for testing hypothesis. For analyzing data we used the two steps Structural Equation model. For
analyzing relation between constructs, in step one, we used Confirmatory factor analysis (CFA), and in other
step Path Analysis have used. For determine that to what extent, indexes are acceptable for measuring
patterns, first we must analyzing all of the measuring patterns separately. After review and confirmation
pattern, for meaningful test of hypothesis we have used Critical Value (CV) index and P. Critical value is the
ratio that resulted of dividing the “Regression Weight Estimation” on “Standard Error”. According to
meaningful level of 0.05, critical value must above 1.96. Below this value, the related parameter in pattern is
not considered important. And values below 0.05 for P value have showed meaningful difference in accounted
value for regression weights with value of 0 in meaningful level of 0.95.