Linda Dawkins, city manager of Pig Mountain, Connecticut, has instituted a public shaming campaign in hopes of getting delinquent taxpayers to pay their outstanding property tax bills. Ninety days after property tax bills are due, the city takes out a full-page newspaper announcement with the names of 50 randomly selected delinquent taxpayers in the Sunday edition of the Pig Mountain Herald. The names of 50 other randomly selected delinquent taxpayers are left out of the ad so that Ms. Dawkins can have a nonshamed control group for her experiment. Ms. Dawkins gathers the delinquency data a month after the publication of the newspaper announcement. She divides delinquent taxpayers into two categories: publicly shamed (coded 1) and not publicly shamed (coded 0). The tax payment variable for each taxpayer is broken down into two categories: made some or all of tax payment (coded 1), and made no tax payment (coded 0). What can Ms. Dawkins conclude about the effectiveness of this program from these data?