Use a 10% significance level. A men's softball league is experimenting with a yellow softball that is easier to see during night games. One way to judge the effectiveness is to count the number of errors. In a preliminary experiment, the yellow softball was used in 10 games and the traditional white softball was used in another 10 games. The number of errors in each game was recorded and is listed here. Yellow 4 9 5 10 White 17 Can we infer that there are fewer errors on average when the yellow ball is used? (Let population 1 be yellow balls and population 2 be white balls.) State the null and alternative hypotheses. Ho : M1 - 12 = v do H1 : H1 - 12