Tres amas de casa van al mercado maria compra 3kg de manzana, 2kg de naranja, y 1kg de pera y paga 23 carmen compra 2kg de manzana, 2kg de naranja y 4kg de pera y paga 24 zoila compra 2kg de manzana, 3kg de naranja y 3kg de pera y paga 25b ¿ cual es el precio por kilos de cada frutas?

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.