(0.318, 0.382)(0.33, 0.37)✔ (0.618, 0.682)(0.649, 0.651)
(0.09, 0.23)✔ (0.077, 0.243)(0.051, 0.27)(0.037, 0.177)
✔ who plan to attend promwho attended promwho did attend promin the sample who plan to attend prom
✔ who have a computerwho had a computerwho did have a computerin the sample who had a computer
✔ that containthat containedthat did containin the sample that contained
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