Lesson 5

Question 1

What does practical significance address that statistical significance does not?

Answer 1

Tells us how large the effect found is and how precise the findings were.

Question 2

What scores correspond with what significance?

Answer 2

p -value = statistical significance.

effect size = practical significance.

Question 3

If a p value falls beyond 3 SD away from the mean, what does this tell us?

Answer 3

Goes beyond the normal distribution and a small p value saying that the values found show a difference.

Question 4

What do Confidence Intervals tell us?

Answer 4

Tell us if we can be confident/ trust the information from the sample and rely it back to the population.

Question 5

What characteristics do you want for your CI?

Answer 5

• narrow (precise)

- line does not cross zero (right means there is an effect from the control).

Question 6

On forest plots why is the diamond important?

Answer 6

That is the result from the sum of the meta-analysis. The middle tells you the effect compare to the control and the width tells you the certainty you have in your result. Cross zero - no difference.

Question 7

The z-score fraction meaning-

Answer 7

Numerator -pratical significance

whole thing - statistical significance.