z test

Question 1

z-test

Answer 1

based on comparing an obtained sample mean (X̄obt) to a known sampling distribution

Question 2

X̄obt

Answer 2

obtained sample mean

Question 3

How do you calculate a z-score for a sample mean

Answer 3

Question 4

z-test steps

Answer 4

1. check that assumptions are met (dependent measure is on interval or ratio scale; sampling distribution to compare X̄obt to is approximately normal)
2. formulate null and alternate hypotheses
3. set alpha value