In an experiment to determine which of three different missile systems is preferable, the propellant burning rate is measuresd. The data after coding are given in the table. Use Kruskal-Wallis test (significance level of 0.01) to test the hypothesis that the propellant burning rates are same for three missile systems.

Missile system I	22.3	16.7	22.7	19.3	18.5
Missile system II	23.4	19.5	17.5	20.8	16.0	19.9
Missile system III	18.4	19.5	17.8	18.0	19.6	22.8	17.1