Check all the statement(s) that are true about the polynomial function graphed. Its leading coefficient is positive. Its leading coefficient is negative. It has an odd degree. It has an even degree. It has exactly two real zeroes. It has exactly three real zeroes. None of the zeroes have even multiplicity. None of the zeroes have odd multiplicity.

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.