Output 5 Group Statistics N Mean Std. Deviation Std. Error Mean Hour Sleep Caffscore 5.39 2.533 1.1328 NoCaffscore 4.38 2.136 0.9552 Independent Samples Test Levene's Test t-test for Equality of Means for Equality of Variances F Sig. df Sig. (2- Mean Std. Error tailed) Difference Difference Equal 0.408 .0525 (A) 8 .156 0.813 567 variances Hour assumed Sleep Equal 1.445 2.678 .153 0.613 563 variances not assumedOutput 7 Paired Samples Statistics Std. Std. Error Mean N Deviation Mean Caffscore 5.4000 5 2.1502 .9616 Pair 1 NoCaffscore 9.4000 5 1.1401 5099 Paired Samples Test Paired Differences 95% Confidence Interval of the Mean Std. Std. Error Difference Sig. (2- Difference Deviation Mean Lower Upper df tailed) Pair 1 Caffscore - NoCaffscore -4.0000 1.5811 7071 -5.6932 (A) 4 .005 2.0368