<P> In both 1995 and 1996, Justice had a higher batting average (in bold type) than Jeter did . However, when the two baseball seasons are combined, Jeter shows a higher batting average than Justice . According to Ross, this phenomenon would be observed about once per year among the possible pairs of interesting baseball players . In this particular case, the Simpson's Paradox can still be observed if the year 1997 is also taken into account: </P> <Table> <Tr> <Th> </Th> <Th_colspan="2"> 1995 </Th> <Th_colspan="2"> </Th> <Th_colspan="2"> </Th> <Th_colspan="2"> Combined </Th> </Tr> <Tr> <Td> Derek Jeter </Td> <Td> 12 / 48 </Td> <Td>. 250 </Td> <Td> 183 / 582 </Td> <Td>. 314 </Td> <Td> 190 / 654 </Td> <Td>. 291 </Td> <Td> 385 / 1284 </Td> <Td>. 300 </Td> </Tr> <Tr> <Td> David Justice </Td> <Td> 104 / 411 </Td> <Td>. 253 </Td> <Td> 45 / 140 </Td> <Td>. 321 </Td> <Td> 163 / 495 </Td> <Td>. 329 </Td> <Td> 312 / 1046 </Td> <Td>. 298 </Td> </Tr> </Table> <Tr> <Th> </Th> <Th_colspan="2"> 1995 </Th> <Th_colspan="2"> </Th> <Th_colspan="2"> </Th> <Th_colspan="2"> Combined </Th> </Tr> <Tr> <Td> Derek Jeter </Td> <Td> 12 / 48 </Td> <Td>. 250 </Td> <Td> 183 / 582 </Td> <Td>. 314 </Td> <Td> 190 / 654 </Td> <Td>. 291 </Td> <Td> 385 / 1284 </Td> <Td>. 300 </Td> </Tr>

This is an example of simpson's paradox because