Solve the proportion.4/12=x/18
2 answers:
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The minimum sample size required for a test with a confidence interval of 
with a z-score of 
and margin of error of E and a population proportion of p is given by:
Given p = 34% = 0.34, E = 0.027,
Therefore,
Given p = 34% = 0.34, E = 0.027,
Therefore,