Discuss the concepts of Mean, Median, Mode, and Standard Deviation, including when each should be used, and evaluate the differences of each. How can knowing this information about data help us? Describe an example from your own personal or professional experiences about using either Measure of Center (mean, median, or mode) or standard deviation, and discuss how knowing that information helped you. Discussion 2 Locate and watch a business presentation that interests you. Websites where you might find business presentation videos include YouTube, CNBC, Forbes, Fortune, and TED. Respond to the following in a minimum of 175 words: Describe the presentation and why it was effective or ineffective. What are some ways a presenter can connect with the audience during a presentation? Discussion 3. Watch Social Media Ethics from PBS. Respond to the following in a minimum of 175 words: Identify a way in which an individual develops a credible persona, both in-person and online.