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TABLE 12-8 A Study Published in the American Journal of Public Health

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TABLE 12-8
A study published in the American Journal of Public Health was conducted to determine whether the use of seat belts in motor vehicles in San Diego County depends on ethnic status. A sample of 792 children treated for injuries sustained from motor vehicle accidents was obtained, and each child was classified according to (1) ethnic status (Hispanic or non-Hispanic) and (2) seat belt usage (worn or not worn) during the accident. The number of children in each category is given in the table below.
TABLE 12-8 A study published in the American Journal of Public Health was conducted to determine whether the use of seat belts in motor vehicles in San Diego County depends on ethnic status. A sample of 792 children treated for injuries sustained from motor vehicle accidents was obtained, and each child was classified according to (1)  ethnic status (Hispanic or non-Hispanic)  and (2)  seat belt usage (worn or not worn)  during the accident. The number of children in each category is given in the table below.    -Referring to Table 12-8, at 5% level of significance, the critical value of the test statistic is A)  3.8415. B)  5.9914. C)  9.4877. D)  13.2767.
-Referring to Table 12-8, at 5% level of significance, the critical value of the test statistic is


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