15.33 Four treatments were compared using a completely randomized design. The data are shown here:

Do the data provide sufficient evidence to indicate a difference in location for at least two of the population distributions? Test using the Kruskal-Wallis H statistic with a = 0.05.

Treatment 1 2 3 4 124 147 141 117 167 121 144 128 135 136 139 102 160 114 162 119 159 129 155 128 144 117 150 123 133 109