A Texas House representative proposed placing solar panels on all public schools to increase green energy and reduce energy costs for districts. Suppose a manufacturer's panels will be purchased only if real world results of the proposed panels show that more than 18% of the panels produce an efficiency greater than 20%. Of a random selection of 140 panels, 32 of the panels result in an efficiency rating greater than 20%. Is there sufficient evidence at the 5% significance level to purchase the proposed panels?