The null hypothesis is the hypothesis to presume that it maybe occur. The null hypothesis has the formula is H0.
H0 is the hypothesis to explain that it don’t have a difference or a relationship between a variable. For example, H0 : U1 = U2
From this example, it explains a average of population of the first group be equal to a average of population of the second group. Summary, The null hypothesis attempts to explain that no change exists between variables, or that a single variable is no different than zero.