It is believed the average credit card debt for all second-year college students in Pittsburgh is $8,400. Use your sample to test the claim that the average credit card debt is less than $8,400.

9,333   6,426   2,221   8,834   9,265  

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7,450   10,000   6,724   11,086   17,996

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3,988   9,700   10,077   1,000   11,993

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8,050   5,500   14,322   7,731   5,444

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1,920   11,216   12,644   9,038   6,003