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.
Hispanic Non-Hispanic
Seat belts worn 31 148
Seat belts not worn 283 330
Referring to these data, which test would be used to properly analyze the data in this experiment?
A) x2 test for independence in a two-way contingency table
B) x2 test for equal proportions in a one-way table
C) ANOVA F-test for interaction in a 2 2 factorial design
D) x2 goodness-of-fit test
Question 2
The term that is given when two variables are correlated but there is no apparent connection between them is:
A) spontaneous correlation.
B) random correlation.
C) spurious correlation.
D) linear correlation.
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