Marcos was introduced to the Normal Distribution today. It is represented as a bell curve. The Emperical Rule says that 68% of the data lies within +/- 1 standard deviation from the mean. 95% lies within 2 standard deviations, and 99.7% lies within 3 standard deviations. Marcos worked on exercises to find how much data lies within certain z-scores. He did an excellent job of listening to the video explanation, and independently answering the questions.