The following data show the number of hours per day 12 adults spent in front of screens watching television-related content. Complete parts a and b below. 1.8 5.5 3.9 4.7 7.8 7.4 0 5.3 2.2 5.7 1.6 2.8 8.6 a. Construct a 99% confidence interval to estimate the average number of hours per day adults spend in front of screens watching television-related content. The 99% confidence interval to estimate the average number of hours per day adults spend in front of screens watching television-related content is from hour (Round to two decimal places as needed.) b. What assumptions need to be made about this population? O A. The only assumption needed is that the population distribution is approximately normal. O B. The only assumption needed is that the population distribution is approximately uniform. O C. The only assumption needed is that the population standard deviation is known. O D. No assumptions are required