Throughout the summer months, when electricity usage is high, the power company appeals to customers to reduce consumption by 10% as a public service to avoid blackouts. An alternative is to offer rebates to customers who reduce usage by 10% compared to same month the previous year. Among 50 randomly chosen customers just asked to reduce electricity employ, 14 reduce their employ by 10% or more. Among 50 randomly chosen customers offered rebates, 25 reduce their electricity use by 10%. Are the differences between the public service appeal and the rebates statistically significant?