A consumer group desired to compare the mean price for 12-ounce bottles of liquid body soap from two nationwide brands and one store brand. Four different bottles of each were selected at large discount drug store, and the prices are noted below. At a = 0.05 level of significance is there a sufficient evidence to conclude that a difference in mean prices? Brand A Brand B Store brand 5.99 8.99 4.99 6.99 7.99 3.99 8.59 6.29 5.29 6.49 7.29 4.49