Description 1. What is the purpose of Mean, Median and mode? 2. How to find the probability using the relative-frequency? 3.What are four different levels of variables, nominal, ordinal, interval and ratio? 4. What statistics is and how it is useful for making managerial decisions? 5. Evaluate probabilities using relative frequency approach. 6.Describe what probability is and when one would use it. 7.Analyze percentiles, quartiles, and the Five-Number Summary. 8.Evaluate skewness of a distribution.