Factor 12t2 + 70t + 72 a= 12(t+3) (t+2) b= 2(3t+4)(2t+9) c= 2(3t+ 9) (2t+4) d= (6t+8)(2t+9)

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.