SIGNIFICANCE TESTING

Null & Alternative Hypothesis

When making a statistical enquiry,we often put forward a hypothesis concerning a population parameter.For example.

• The mean height of 15-year-old girls is 1.62
• The proportion of left-handed people is 0.95

This hypothesis called the null hypothesis and is denoted by (H0)

In order to test the validity of H0, we consider observations made from random samples taken from the population and perform a statistical test.
If this test shows that we should reject null hypothesis,H0,we do so in favour of an alternative hypothesis,denoted by H1.