TABLE 11-8
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 11-8, the calculated test statistic is ________.
A) -0.9991
B) -0.1368
C) 48.1849
D) 72.8063

Question

TABLE 11-8
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 11-8, the calculated test statistic is ________.
A) -0.9991 
B) -0.1368 
C) 48.1849 
D) 72.8063

Quizplus · Accepted Answer

To calculate the test statistic for testing the independence of seat belt usage and ethnic status, we can use the chi-square test. The calculated test statistic from the table is 48.1849, which corresponds to a p-value less than 0.001. Therefore, we can reject the null hypothesis of independence and conclude that seat belt usage in motor vehicles in San Diego County depends on ethnic status.

TABLE 11-8 A Study Published in the American Journal of Public Health