6 Inferential Stats

Question 1

Descriptive stats

Answer 1

Describe and summarises the sample data.

Includes
🔸measure of central tendency
🔸measures of dispersion

Question 2

4 mains issues to consider when choosing the right statistical test?

Answer 2

1. Association or difference?
2. No of independent variables
3. No of exp conditions
4. Parametric or non?

Question 3

Conditions to meet to use a parametric test

Answer 3

🔸 data is normally distributed
🔸 data is interval/ratio (scale)
🔸 data is large (n=30+)

Question 4

Pros of parametric tests?

Answer 4

They are tests of choice.

They are more sensitive and are more likely to pick up a significant difference.

Question 5

Cons of parametric tests?

Answer 5

Increased chance of type 1 errors in small or skewed samples.

Question 6

What 3 values do we report w statistical tests?

Answer 6

🔸test value (t, F, or U)
🔸degree of freedom (df)
🔸P value