The paper "The Effect of Multitasking on the Grade Performance of Business Students" (Research in Higher Education Journal [2010]: 1-10) describes an experiment in which 62 undergraduate business students were randomly assigned to one of two experimental groups. Students in one group were asked to listen to a lecture but were told that they were permitted to use cell phones to send text messages during the lecture. Students in the second group listened to the same lecture but were not permitted to send text messages. Afterwards, students in both groups took a quiz on material covered in the lecture. Data from this experiment are summarized in the accompanying table.

Use the given information to construct and interpret a 90% confidence interval for the difference in mean quiz score for the two treatments (texting allowed and texting not allowed).

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Standard Experimental Group Mean Quiz Devlation of Group size score 31 4281 No Texting 58.67 Quiz scores 9.91 10.42 Texting