Table 3 Percentage of households who either boiled or chlorinated their drinking water
Percentage (fraction) that boiled or chlorinated water | p-value (2df) | |||
|---|---|---|---|---|
1992 | 1993 | 1995 | ||
Zirándaro | 16 (116/722) | 27 (171/632) | 37 (259/700) | <0.05 |
Alcozauca | 12 (88/730) | 41 (275/670) | 27 (194/729) | <0.05 |
Xochistlahuaca | 11 (86/784) | 41 (163/399) | 55 (327/595) | <0.05 |
Copalillo | 43 (420/976) | 44 (322/732) | 60 (520/867) | <0.05 |
Coahuayutla | 39 (210/539) | 52 (262/503) | 49 (251/512) | <0.05 |