We survey a random sample of households in Philadelphia to test if less than 50% of families are families where both parents are working full time.

A)

Z-test about a proportion with a two-sided alternative

B)

Regression

C)

T-test about a mean with a two-sided alternative

D)

T-test about a mean with a one-sided alternative

E)

Z-test about a proportion with a one-sided alternative

F)

Chi-square test of independence

G)

One-way Analysis of Variance (ANOVA