A men's softball league is experimenting with the yellow baseball that is easier to see throughout night games. One way to judge the effectiveness is to count number of errors. In the preliminary experiment, the yellow baseball was employed in 10 games and traditional white baseball was employed in another 10 games. The number of errors in each game was recorded and is listed here. Can we infer that there are fewer errors upon average when the yellow ball is used?
Yellow 5 2 6 7 2 5 3 8 4 9
White 7 6 8 5 9 11 8 3 6 10