A study was conducted to determine the relationship between annual income and number of children per family. Compute percentages for each of the income categories; then run a chi- square test of independence and draw conclusions. Use a 5 .10.
Separately for each region, answer the following questions.
a. Is there significant evidence of an association between annual income and number of children?
b. Compute the odds ratio of having more than two children for low- income versus high- income families, and place a 95% confidence ­interval on the odds ratio.
c. Interpret the odds ratio.
d. Compare your results in parts (a)–(c) for the three regions.

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