A group of compulsive gamblers was selected. The amounts (in dollars) they spent on lottery tickets for one week are shown. Then they were required to complete a workshop showing that the chances of winning were not in their favor. After they complete the workshop, test the claim that, at α = 0.05, the workshop was effective in reducing the weekly amount spent on lottery tickets.

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А В с D E FG н Subject A B D Н 150 161 197 98 56 122 76 72 43 123 186 102 53 Before After 125 72