Although fairly inexpensive and widely used,single-source data should be used with caution because the data tend to be unreliable and weak in external validity.

Name: Although fairly inexpensive and widely used,single-source data should be used with caution because the data tend to be unreliable and weak in external validity.
Brand: Quizplus
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The Answer of Although fairly inexpensive and widely used,single-source data should be used with caution because the data tend to be unreliable and weak in external validity.

Although Fairly Inexpensive and Widely Used,single-Source Data Should Be Used