Biostatistics - Hypothesis testing questions with actual solutions 2025.

Biostatistics - Hypothesis testing
questions with actual solutions 2025.




A hypothesis - ANSWER: is a statement about a population parameter

null hypothesis (H0) - ANSWER: statement about population parameter assumed to be
true

Alternative hypothesis (H1/Ha) - ANSWER: statement about the population parameter
that is contradictory to the H0

Form of H0 - ANSWER: H0 = u1 = u2 (mu, not u)

Ha/H1 come in different forms - ANSWER: u1 is not equal to u2 (mu, not u)
u1 > u2
u1 < u2

How to choose between H0 and Ha? - ANSWER: Determine the rejection region. if the
test calculated lies within the rejection region, you must reject H0

How to determine the rejection region? - ANSWER: two approaches:
Critical value approach
P-value approach

The critical value - ANSWER: Determines the borders of the rejection region

Level of significance (alpha) - ANSWER: the probability of making type I error (rejecting
the H0 when its true)