12 It is known that \(20 \%\) of plants of a certain type suffer from a fungal disease, when grown under normal conditions. Some plants of this type are grown using a new method. A random sample of 250 of these plants is chosen, and it is found that 36 suffer from the disease. Test, at the \(2 \%\) significance level, whether there is evidence that the new method reduces the proportion of plants which suffer from the disease.