Twenty university students (chosen at random from students enrolled at the University of Verm took part in an experiment testing the effect of watching FOX News vs. CNN on knowledge of w events. The 20 participants were divided into two equal groups of 10 participants each. One gre was assigned to watch FOX and the other was assigned to watch CNN. Participants then watch their assigned station (FOX or CNN) for three hours a night for four weeks. At the end of the for week perlod they were administered a test of world knowledge. The results were as follows: m 110, mCNN 99, Srox 10, SCNN6. Compute the lower limit of the 95% confidence interval around mFox - MCNN. (Please give you answer to two decimal places.) 3.09

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