The objective of this study is to determine whether age plays a contributing factor in the Stroop test reaction time. The Stroop test measures response time and the accuracy of the response. Thus the aim was to determine whether age group differences affected test scores.

Hypothesis: The older the participant the lower the Stroop test result will be.

Using the information in table 1 analyse the results using Mann-Whitney U-test.

table 1:

Age	Correct Result	Average Match	Average Non-Match
Young	40	0.774	0.896
Young	40	1.17	1.323
Young	39	1.365	1.575
Young	40	1.766	2.182
Young	40	0.788	0.987
Young	40	1.511	1.673
Young	40	1.257	1.389
Young	40	0.787	0.974
Young	40	0.836	0.98
Young	40	0.958	1.2
Young	40	0.908	0.956
Young	40	0.921	1.264
Young	40	0.962	1.229
Young	40	0.559	0.754
Young	40	0.876	1.141
Young	38	0.765	1.002
Young	36	0.925	1.213
Young	40	0.831	0.988
Young	40	0.895	1.105
Young	39	1.511	1.643
Young	40	1.109	1.453
Young	39	1.029	1.469
Young	40	1.248	1.498
Young	36	1.091	1.5
Young	40	0.843	1.101
Young	36	0.783	1.296
Young	38	1.173	1.761
Young	40	0.979	1.139
Young	38	1.006	1.298
Young	39	1.846	2.245
Old	35	4.117	4.041
Old	39	2.187	2.443
Old	39	1.627	1.837
Old	39	1.34	1.79
Old	40	1.043	1.152
Old	39	1.877	3.089
Old	37	1.531	2.1
Old	40	1.31	1.288
Old	36	1.113	1.632
Old	39	1.082	1.3
Old	38	1.46	1.58
Old	39	1.671	1.77
Old	40	1.679	1.98
Old	38	0.941	1.09
Old	31	1.111	1.366
Old	40	1.605	1.534
Old	40	1.014	1.202
Old	40	1.121	1.33
Old	35	1.94	2.04
Old	40	1.603	1.913
Old	40	1.35	1.49
Old	39	1.734	2.329
Old	40	1.19	1.387
Old	39	0.81	1.126
Old	39	1.237	1.323
Old	37	1.88	2.817
Old	38	1.479	2.175
Old	39	1.111	1.323
Old	40	1.207	1.474
Old	33	3.716	4.726