For cronbach, the extension of alpha and classical test theory came when fisherian notions of experimental design and analysis of variance were put together with the idea that some treatment conditions could be considered random samples from a large universe, as alpha assumes about item sampling. Calculating, interpreting, and reporting cronbach s alpha reliability coefficient for likerttype scales joseph a. We would like to show you a description here but the site wont allow us. As such, removal of this item should be considered. Cronbachs alpha is most commonly used when you want to assess the internal consistency of a questionnaire or survey that is. Insetospraga associados a cultura da melancia em roraima e. Calculating, interpreting, and reporting cronbachs alpha. Cronbach s alpha showed the questionnaire to reach acceptable reliability. The reliability evaluation of the instrument by the cronbach alfa resulted in 0. The one exception to this was item 4, which would increase the alpha to. In stata, how do i compute cronbachs alpha statistic to test. Su ventaja reside 11th latin american and caribbean conference for engineering and technology cancun, mexico august 1416, 20 3.