Trauma admissions to a hospital in Germany were classified according to season. They were won- dering if severe trauma injuries were more common in some seasons than others. Assume that there were 1200 trauma cases in the sample and that the sample is representative of severe trauma injuries in Germany. The data is summarized the the accompanying table. Do these data support the theory that the proportion of severe trauma cases is not the same for the four seasons? Test the relevant hypotheses using a significant level of 0.05.

Season Frequency

Winter 228

Spring. 332

Summer 352

Fall 288

Total 1200

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