Bureau of Transportation Statistics (BTS)
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Table 1 - Kruskal-Wallis Test of Vehicle Breakdown Duration

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Variable Chi-square df Significance level
Report mechanism 16.7 1 0.44*10E-4
Vehicle type 17.1 3 0.67*10E-3
Location 8.5 2 0.014
Time of day 12.8 5 0.025