3. Null Hypothesis Significance Testing (NHST) is a very common framework used to quantitatively assess the representativity of sample. Answer the following questions.

a.What is a null hypothesis?(25-75) /2.5

b.What is an alternative hypothesis? (25-75) /2.5

c.What is a probability value or p-value? (25-75) /2.5

d.Briefly, describe the logic of NHST by answering the following questions.

i.Which hypothesis are we testing when we do NHST? (25-50) /2.5

ii.Which hypothesis do we want to reject and which hypothesis do we want to accept? (25-50) /2.5