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Question 4 

According to the Bureu of Census, during athe course of a particular year, 38.0% of the 213 merchant ships lost were general cargo carriers, while 43.8% of the 219 ships lost during the following year were in this category. Using a two-tail test at the 0.05 level, examine whether this difference could have been the result of chance variation from one year to the next. 

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