a. According to a survey, the average person watched 4.35 hours of television per day in 2005. A random sample of 20 people were asked for the number of hours of television watched per day for last year. At the 20% significance level, the data do not provide sufficient evidence to conclude that the amount of television watched per day last year by the average person differed from that in 2005. (Note: x = 4.822 hours and s = 2.234 hours.) The confidence interval is .) (Round to three decimal places as needed.)