Post a brief outline of the case study and consider the conclusion that “the vocational rehabilitation intervention program may be effective at promoting full-time employment.” What statistical information shows whether the program was effective (or not)?

Post a brief outline of the case study and consider the conclusion that “the vocational rehabilitation intervention program may be effective at promoting full-time employment.” What statistical information shows whether the program was effective (or not)? Review the factors that limit the internal validity of a study (history, maturation, testing, instrumentation, statistical regression, selection bias, and attrition).Select and explain which of these factors might limit the ability to draw conclusions regarding cause-and-effect relationships.