EXERCISE 1: Watch https://www.youtube.com/watch?v=Qfh-k9P8ZPI a) How does this situation about the gumballs relate to sampling distribution of sample proportions and confidence intervals? 2) In the video, a sample of 20 individuals was used. A child makes a final estimation by averaging all the individual estimations in the sample. If people's intuition at guessing the number of gumballs behaved in a way similar to what we studied in Chapter 7, how many times as precise would the child's final estimation be with a sample of 180 individuals? Why? EXERCISE 2: Read the following article about Post ABC polls for the 2020 Presidential Election E published in the Washington Post on November 1st. (https://www.washingtonpost.com/politics/2020/11/01/post-abc-polls-biden-has-slight-lead-pennsylvania-florida-toss-up/?arc404=true ). 1) Does the article use confidence intervals at any time? If yes, how big were the samples and how much was the margin of error? 2) What could you infer from those intervals in regard to who could win the presidential election? Use as much vocabulary as possible