From the problem, we know that the acceptable error, e, is 0.03 (3%=0.03) and z_{\frac{\alpha}{2}} Z_{0.05}=1.645 because the confidence level is 90%. The acceptable error, e, is the diffe...From the problem, we know that the acceptable error, e, is 0.03 (3%=0.03) and z_{\frac{\alpha}{2}} Z_{0.05}=1.645 because the confidence level is 90%. The acceptable error, e, is the difference between the actual population proportion p, and the sample proportion we expect to get from the sample.
