Question: A literacy expert is trying to institute a new program for improving reading scores of people who are incarcerated. The expert finds pairs of inmates who are matched on their IQ scores and she randomly assigns one member of each pair to receive the new reading program and the other member of each pair watches TV for the same amount of time. At the end of the program all the inmates in the study are given a reading exam. The data are:

Do the data suggest that the reading program significantly affected reading scores?