Exam 13: Goodness-Of-Fit Tests and Contingency Analysis

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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. 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 these data,which of the following conclusions should be reached if the appropriate hypothesis is conducted using an alpha = .05 level? Referring to these data,which of the following conclusions should be reached if the appropriate hypothesis is conducted using an alpha = .05 level?

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Contingency analysis is used only for numerical data.

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We expect the actual frequencies in each cell to approximately match the corresponding expected cell frequencies when:

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A walk-in medical clinic believes that arrivals are uniformly distributed over weekdays (Monday through Friday).It has collected the following data based on a random sample of 100 days. A walk-in medical clinic believes that arrivals are uniformly distributed over weekdays (Monday through Friday).It has collected the following data based on a random sample of 100 days.   Assuming that a goodness-of-fit test is to be conducted using a 0.10 level of significance,the critical value is: Assuming that a goodness-of-fit test is to be conducted using a 0.10 level of significance,the critical value is:

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