TABLE 12-1
A study published in the American Journal of Public Health was conducted to determine whether the use of seat belts in motor vehicles depends on ethnic status in San Diego County. 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 12-1, 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

Question

TABLE 12-1
A study published in the American Journal of Public Health was conducted to determine whether the use of seat belts in motor vehicles depends on ethnic status in San Diego County. 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 12-1, 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

Quizplus · Accepted Answer

At a 5% level of significance for a chi-square distribution with 1 degree of freedom, the critical value is 3.8415.

TABLE 12-1 A Study Published in the American Journal of Public Health