Advertisers fear that users of DVRs (digital video recorders) will "fast forward" past commercials when they watch a recorded program. A leading British pay television company told its advertisers that this effect might be offset because DVR users watch more TV. A sample of 15 DVR users showed a daily mean screen time of 2 hours and 26 minutes with a standard deviation of 14 minutes, compared with a daily mean of 2 hours and 7 minutes with a standard deviation of 12 minutes for a sample of 15 non-DVR users. (a-1) Construct a 95 percent confidence interval for the difference in mean TV watching. (Round your answers to 2 decimal places.) The 95% confidence interval is from ____ to _____ .