Inferential statistics are used to make generalizations about a based on a sample. If the study aims to draw conclusions beyond the specific group in the rehabilitation program, it would be inferential. Researchers should create a null hypothesis because it provides a specific statement to test against the data. The null hypothesis might be that the program has no effect on the participants' recovery or well-being. Formulating a null hypothesis allows researchers to use statistical tests to determine whether the observed data provides enough evidence to reject the null hypothesis in favor of an alternative hypothesis. Yes, researchers should create a alternative hypothesis because it provides a direction for the research and helps interpreting the results of statistical tests. If the study involves the means of two groups and a continuous outcome variable a T- test would be appropriate. The chi test is not suitable if the primary outcome variables are continuous rather than categorical, which is designed to analyze categorical data and determine if there is a significant association between the two