After Kim drank some of the orange juice, there was 183 mL of orange juice left in the bottle. When Kim bought the bottle of orange juice, there was 250 mL of orange juice. What was the percent of change in volume of orange juice

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.