Un automóvil sale de una estación y recorre en linea recta 400 metros a la derecha , luego se devuelve 500 metros se detiene y vuelve a correr 100 metros a la derecha . De acuerdo con este recorrido el automóvil esta : A. 200 metros ala izquierda de la estación B. 100 metros a la derecha de la estación C. 50 metros a la derecha de la estación D. En la estación

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.