Table 2.

Probability of finding a tracer medicine manufactured in Tanzania in a sample outlet, by rural and urban location, 2006 and 2009 (40 medicines)

Location	2006			2009
	Probability	Standard error	Sample size	Probability	Standard error	Sample size
Rural	0.172	0.0087	1880	0.113	0.0073	1880
Urban	0.163	0.0086	1840	0.097	0.0070	1800
Difference	0.009	0.0122		0.016	0.010
Two sample test of proportions:	z-test = 0.7588			z-test = 1.587
H0 : Prural = Purban	Pr(|Z| < |z|) = 0.4480			Pr(|Z| < |z|) = 0.112
Ha : Prural ≠ Purban	Null-hypothesis is accepted			Null-hypothesis is accepted