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

Table 3.

Probability of finding a medicine manufactured in Kenya 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
0.052
0.0051
1880
0.048
0.0049
1880
Urban
0.090
0.0067
1840
0.083
0.0070
1800
Difference
-0.039
0.0084
 
0.034
0.0082
 
Two sample test of proportions:
z-test = -4.595
z-test = -4.222
H0 : Prural = Purban
Pr(|Z| < |z|) = 0.0000
Pr(|Z| < |z|) = 0.0000
Ha : Prural ≠ Purban Null-hypothesis is rejected Null-hypothesis is rejected