The biannual ABDC survey of school students indicated that 78% of tenth graders in 2016 considered having

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The biannual ABDC survey of school students indicated that 78% of tenth graders in 2016 considered having a car to be essential or very important, compared to 45%

when the survey was first conducted in 1968. Are the sample percentages of 45% in 1968 and 78% in 2016 based on independent samples, or dependent samples? Explain.

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