Question:A cross-sectional study among rural residents of one town in Bangladesh looked at the association between the level of arsenic in the well water of each household and the presence of high blood pressure in the head of the household. The SPSS results are below. What is the best interpretation of these results?

Blood Pressure (bp)

Total

0 Normal

1 High

Water contaminated with arsenic	0. No arsenic	Count	119	28	147
		Expected Count	93.6	53.4	147
		% within arsenic water contaminated with arsenic	81%	19%	100%
	1. Arsenic	Count	23	53	76
		Expected Count	48.4	27.6	76
		% within arsenic water contaminated with arsenic	30.3%	69.7%	100%

Total	Count	142	81	223
	Expected Count	142.0	81	223
	% within arsenic water contaminated with arsenic	63.7%	36.3%	100%

Chi-Square Tests

	Value	df	Asymp. Sig. (2-Sided)	Exact Sig. (2-Sided)	Exact Sig. (1-Sided)
Pearson Chi-Square	55.654(b)	1	0.000
Continuity Correction(a)	53.484	1	0.000
Likelihood Ratio	55.903	1	0.000
Fisher's Exact Test				0.000	0.000
Linear-by-Linear Association	55.404	1	0.000
N of Valid Cases	223

^aComputed only for a 2 2 table ^b0 cells (0.0%) have expected count less than 5. The minimum expected count is 27.61.

Select answer below:

a: Those with arsenic in their well are less likely to have high blood pressure compared to those without arsenic in their well, but the association is not statistically significant.

b: Those with arsenic in their well are significantly less likely to have high blood pressure compared to those without arsenic in their well.