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. 2014 Mar 10;10:12. doi: 10.1186/1744-8603-10-12

Table 1.

Probability of finding a tracer medicine 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
0.40
0.0113
1880
0.42
0.011
1880
Urban
0.64
0.0112
1840
0.60
0.012
1800
Difference
-0.24
0.0159
 
-0.18
0.016
 
Two sample test of proportions:
z-test = -14.6
z-test = -11.1
H0 : Prural = Purban
Pr(|Z| < |z|) = 0.0000
Pr(|Z| < |z|) = 0.0000
Ha : Prural ≠ Purban Null-hypothesis is rejected Null-hypothesis is rejected