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)