homwork help

Document1 - Microsoft Word Review View AaBbCcDd AaBbCcDd AaBbCc AaBbCcl Aa Bl AaBbCc[ AaBbCcDd AaBbCcDd 1 Normal 1 No Spacing Heading 1 Heading 2 Title Subtitle Subtle Emp.. Emphasis Paragraph Styles 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 23 minutes with a standard deviation of 15 minutes, compared with a daily mean of 2 hours and 15 minutes with a standard deviation of 13 minutes for a sample of 15 non-DVR users. (a-1) Construct a 90 percent confidence interval for the difference in mean TV watching. (Round your answers to 2 decimal places.) The 90% confidence interval is from to