Describe two methods that a researcher can use to avoid obtaining a non-representative sample

How does tan build a central idea of her story in the excerpt? tan discusses the types of questions on achievement tests to support the idea that the tests limit students' ability to write well tan explains a question on a language achievement test to support the idea that the tests shd d include more interesting content tan gives an example of her experience with achievement tests to support the idea that they are not always accurate measures of language ability tan considers how her mother might answer a question on a test to support the idea that nonstandard english limits a person's ability to communicate

Can someone give me advice on how to learn the hawaiian language.

La historia de colombia es una influencia muy importante en las obras (works) de gabriel garcía márquez.