Table 2 Experiment data with T-test
|  | Ave. (ROS) | Ave. (IE) | T stat | T critical two-tail | P(T ≤ t) two-tail |
|---|---|---|---|---|---|
Web pages found | 64 | 17.875 | 19.654 | 2.131 | 4.06E-12 |
Keywords drawn/pages viewed | 48.312/14.437 | 21.6875/6.75 | 10.052/11.181 | 2.131/2.131 | 4.67E-08/1.13E-08 |
Keywords added/pages viewed | 35.437/12.5 | 16.1875/6.5625 | 7.066/6.188 | 2.131/2.131 | 3.83E-06/1.74E-05 |
Islands | 1.812 | 4.8125 | −7.745 | 2.131 | 1.28E-6 |