Unformatted text preview: 09-11-07 Introduction To Statistics Notes Ch. 2- 1, 2-2 (2.1)-ultimate objective is to understand the data, not just obtaining a table or graph-important characteristics of data include: (1) Center-a representative or average value that indicates where the middle of the data set is located, (2) Variation-a measure of the amount that the data values vary among themselves, (3) Distribution-the nature or shape of the distribution of the data, such as bell-shaped, uniform, or skewed, (4) Outliers-sample values that lie very far away from the vast majority of the other sample values, and (5) Time- changing characteristics of the data over time. (2.2)-often helpful to organize and summarize the data by constructing a frequency distribution (helps us understand the nature of the distribution of a data set-avoid making the class width the difference between the lower class limit and the upper class limit-simplify process of finding class boundaries by understanding that they basically split the difference between the...
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This note was uploaded on 04/17/2008 for the course MATH unknown taught by Professor Sapko during the Fall '08 term at Mass Colleges.
- Fall '08