A random sample of 1000 families in Country A reported 13% single-parent families. Another random sample of 600 families in Country B reported 17% single-parent families. Is there a lower percentage ofsingle-parent families in Country A than in Country B at the95% significancelevel?

Let p1 be the proportion of families in Country A that aresingle-parent families. Let p2 be the corresponding proportion for Country B.

Determine the null and alternative hypotheses.

The test statistic is

.