Asingle tree produces about 2.6 × 10² lb of oxygen each year. the amazon rainforest has about 3.9×1011 trees. about how many pounds of oxygen are produced in the rainforest each day ? enter your answer in the box. 2.8 × 10 lb

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.