The magazine Desperate Housewives publishes a survey of its female readers called ""Cooking and the American Wife."" It reports that 87 percent of American wives like to cook wearing aprons. The critical flaw in this conclusion is the fact that .

The selected sample does not represent all American wives

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.

abraham lincoln issued the preliminary emancipation proclamation on september 22nd, 1862. it stipulated that if the southern states did not cease their rebellion by january 1st, 1863, then proclamation would go into effect.