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July expects 10% of the coupons she mails out to be used at her hardware store. 38 of the 200 she mailed this month were
"July expects 10% of the coupons she mails out to be used at her hardware store. 38 of the 200 she mailed this month were used. Is this significantly different than expected?"
A researcher carried out the appropriate hypothesis test, and rejected the null hypothesis. Choose the best interpretation of the results.
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