Each subject in a sample of 100 men and 100 women is asked to indicate which of the following factors (one or more) are responsible for increases in teenage crime: A, the increasing gap in income between the rich and poor;

B, the increase in the percentage of single-parent families; C, insufficient time spent by parents with their children. A cross classification of the responses by gender is

a. Is it valid to apply the chi-squared test of independence to this 2 × 3 table?
Explain.

b. Explain how this table actually provides information needed to crossclassify gender with each of three variables. Construct the contingency table relating gender to opinion about whether factor A is responsible for increases in teenage crime.

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Gender A B C Men 60 81 75 Women 75 87 86