When designing a questionnaire, there are different types of hypotheses to consider, depending on your research design and question. A null hypothesis states that there is no relationship or difference between the variables, such as "There is no difference in customer satisfaction between online and offline channels". An alternative hypothesis states that there is a relationship or difference between the variables, such as "Online channels have higher customer satisfaction than offline channels". A directional hypothesis specifies the direction of the relationship or difference between the variables, such as "Online channels have higher customer satisfaction than offline channels". Whereas, a non-directional hypothesis states that there is a relationship or difference between the variables but not the direction, such as "There is a difference in customer satisfaction between online and offline channels". It's important to choose the type of hypothesis that best suits your research question and data analysis plan.