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25 December, 11:12

A survey estimated that the average cost of textbooks for a semester of college is $320 with a margin of error of ± 8%. What is the range of the possible average cost of text books?

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  1. 25 December, 11:30
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    8% x 320 = 25.6

    320+25.6=345.6

    320-25.6=294.4

    range = 294.4 to 345.6
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