Inferential Statistics

Question 1

What 3 things do you look at when deciding what stats test to use?

Answer 1

1. What level of measurement you have
2. A difference or a correlation?
3. What design was used

Question 2

Practice the stats test grid

Answer 2

Independent Related Correlation
Nominal data Chi Sign X
Ordinal Mann Whitney Wilcoxon Spear

Question 3

Rules for significance with Spearman’s Rank and Chi-Squared

Answer 3

Observed value must be EQUAL TO or GREATER THAN the critical value

Question 4

Rules for significance with Sign Test, Wilcoxon and Mann-Whitney U

Answer 4

Observed value must be EQUAL TO or LESS THAN the critical value

Question 5

Model answer

Answer 5

The observed value (…) is greater/less than the critical value (…) so the results are/not significant because for this test, the observed value had to be greater/less than the critical value (one/two-tailed test, p <0.05)

So the researcher would accept their … hypothesis and reject their … hypothesis