what is an alternative hypothesis 
an alternative hypothesis is a direct contradiction of a null hypothesis this means that if one of the two hypotheses is true the other is false the bottom linea null hypothesis states there is no difference between groups or relationship between variables it is a type of statistical hypothesis and proposes that no statistical significance exists in a set of given observations null means nothing the null hypothesis is used in quantitative analysis to test theories about economies investing strategies and markets to decide if an idea is true or false hypothesis testing assesses the credibility of a hypothesis by using sample data it is represented as h0 and is sometimes simply known as the null 