Null and Alternative hypothesisCreated by:
In a research study, null hypothesis means that there is no difference between the groups being compared in the study. Null hypothesis will become the formal basis for statistical testing for significance after gathering and analze the research data. By assuming there is no assocaition in the population, statistical test will help to estimate the probability that an association observed in a study may be due to chance. Alternative hypothesis means there is a dfiffernece between the groups compared. For example, you wish to test whether a new medication - Drug A is better than a placebo in treating Disease Z. Your null hypothesis will be there is no difference in treating patients with Disease Z with either Drug A or a placebo. The alternative hypothesis will be Drug A is significantly better than placebo in trating patient with Disease Z. Do you have any experience in designing a clinical study or involved in formulating the null and alternative hypothesis??