2. A class survey in a large class for first year college students asked, "About how many hours do you study during a typical week?" The mean response of the 463 students was 15.3 hours. Suppose that we know that the study time follows a normal distribution with standard deviation of 8.5 hours in the population of all first-year students at this university. a. Provide a description of the parameter. [1 mark] b. Construct a 95-confidence interval for the parameter of interest. [2 marks]