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

question 129

Multiple Choice

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
1() seat belt usage (worn or not worn) during the accident. The number of children in each category is given in the table below.
$$\begin{array}{l}\begin{array} { l |r r } &\text {Hispanic}&\text { Non- Hispanic }\\\hline \text { Seat belts worn } & 31 & 148 \\\text { Seat belts not worn } & 283 & 330\end{array}\end{array}$$
-Referring to Table 12-1, at 5% level of significance, the critical value of the test statistic is

• A) 13.2767.
• B) 5.9914.
• C) 9.4877.
• D) 3.8415.