Answer: The selected sample does not represent all American wives
Step-by-step explanation:
According to the question, magazine department used their magazine reader for conducting the research on how many american wives wear apron for cooking .The result of study suggest that 87% wives use apron while cooking food.
But , apparently only american wives who are readers of the magazine are considered in this research which produced incorrect result as this study must include sample of american wives even whether or not they are reader of the magazine.