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Outline

1	CLAST Statistics and Probability Identifying Relationships Among Mean, Median, and Mode
2	Data Distributions Symmetrical Data Distribution Normal Distribution Skewed (or Asymmetrical) Data Distribution Skewed Right Skewed Left
3	Data Distribution Basics Mode - 70 and 90 element that occurs most frequently highest point on the graph may be modal, multi-modal, or non-modal Median - 80 the middle value of all the data Mean - 80 arithmetic average
4	Symmetrical Data Distribution with Central Peak one mode highest point on the graph is at the center mode = mean = median right and left halves of the graph are mirror images of each other
5	Normal Distribution One of the most important distributions in statistics
6	Skewed Data Distribution Mode is still the highest part of the graph. Mean tends to be pulled by the tail more than the median. Skewed Right tail is pulled to the right mean is greater than the median Skewed Left tail is pulled to the left mean is less than the median
7	Skewed Data Distribution If the mode represents more than half of the data, then the mode equals the median.