申論題

2. (總分 25 分) An experiment was conducted to examine the effect of a device on users' perception reaction times to road hazard ahead. Eight people were included in this study. The reaction times (in seconds) for the experiment are as follows:

(b). (7 分) If you consider the two reaction times as paired observations, do the data present sufficient evidence to indicate a difference in mean reaction times for the two reaction times? Calculate a 95% confidence interval for the difference in the two population means. Test using α = .05.