A psychologist conducted a study using a Wilcoxon Signed-Ranks test to investigate whether there is a significant difference in anxiety levels before and after a mindfulness session.

The Wilcoxon test yielded an observed (calculated) value of $T = 4$ for $N = 9$ participants.

Critical values of $T\,$ for a one-tailed test where $N = 9$

Significance Level	0.05	0.025	0.01
Critical value	8	5	3

Using the critical values table above, explain whether the psychologist has found a significant difference or not.

Data recording, analysis and presentation

Question 28

Critical values of $T\,$ for a one-tailed test where $N = 9$

Markscheme

Data recording, analysis and presentation

Question 28

Critical values of $T\,$ for a one-tailed test where $N = 9$

Markscheme

Data recording, analysis and presentation

Question 28

Critical values of T T\,T for a one-tailed test where N=9N = 9N=9

Data recording, analysis and presentation Questions

Data recording, analysis and presentation

Question 28

Critical values of T T\,T for a one-tailed test where N=9N = 9N=9

Data recording, analysis and presentation Questions

Critical values of $T\,$ for a one-tailed test where $N = 9$

Critical values of $T\,$ for a one-tailed test where $N = 9$