HYPOTHESES AND THE SCIENTIFIC METHOD
The scientific method consists of hypothesis formulation, experimentation to test the hypothesis, and
Hypotheses are statements of prior belief. They are modified by results of experiments to give rise
to new hypotheses. The new hypotheses then in turn become the basis for new experiments.
2.0 NULL HYPOTHESIS (H0) & ALTERNATIVE HYPOTHESIS (HA):
The null or research hypothesis, H0, states that there is no difference between two comparison
groups and that the apparent difference seen is due to sampling error.
The alternative hypothesis, HA, disagrees with the null hypothesis. H0 and HA
are complimentary and exhaustive.
A hypothesis can be rejected but cannot be proved. A hypothesis cannot be proved in a conclusive way
but an objective measure of the probability of its truth can be given in the form of a p-value.