Do single-parent families tend to be more impoverished than families with two parents? A family researcher studied a sample of 35 one-parent and 65 two-parent families in a particular city to determine whether their total family income fell below the poverty level. Applying a chi-square to the following data, test the null hypothesis that one- and twoparent families do not differ with respect to poverty.

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Family Structure Total Family Income One Parent Two Parents Below poverty level Not below poverty level 20 45 24