Applied Statistics - Hypothesis Testing - 5.1.1

Question 1

What is a hypothesis test?

Answer 1

A statistical way to test a statement made about a population

Question 2

Null Hypothesis

Answer 2

The assumed population parameter, assuming no change has happened

Question 3

Alternate Hypothesis

Answer 3

How we think the population parameter could have changed

Question 4

One tailed test calculates…

Answer 4

Has the population parameter increased of decreased

Question 5

Two tailed test calculates…

Answer 5

Has the population parameter changed

Question 6

What is the Null and alternate hypothesis in a one tailed test

Answer 6

H0: θ = …
H1: θ < … OR θ > …

Question 7

What is the Null and alternate hypothesis in a two tailed test

Answer 7

H0: θ = …
H1: θ ≠ …

Question 8

What is the Significance level

Answer 8

The smallest probability that an event could have occurred by chance

Question 9

What is a Test Statistic

Answer 9

A value calculated from a sample to test the hypothesis

Question 10

What is the critical region

Answer 10

The values of a test statistic, which leads to H0 being rejected

Question 11

If probability is in critical region…

Answer 11

Reject null hypothesis

Question 12

If probability is in acceptance region…

Answer 12

Accept null hypothesis

Question 13

Properties of two tailed test

Answer 13

• Two critical regions
• Significance is halfed (5% -> 2.5%)