* ANSWER ASAP. *

[[ is my answer correct? ; I felt really sure that this was right
but please let me know if i made a mistake. ]] ty!!<3

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

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.

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?