MATH 10041 Lecture Notes - Lecture 5: Interquartile Range, Standard Deviation, Symmetric Graph

• School: Kent State University
• Department: Mathematics
• Course: MATH 10041
• Professor: Rajeev Rajaram

Document Summary

Chapter 3- numerical summaries of center and variation. Mean- the most commonly used measure of center. When symmetric, the mean is the typical value of the graph. Standard deviation- how far away the typical observation is from the mean symbol (sx on calculator or s ) Typical distance of the observations from their mean ( From left to right on a unimodal or symmetric graph, the standard deviations are as follows . 15%, 2. 35%, 13. 5%, 34%, 34%, 13. 5%, 2. 35%, . 15% + & - 2 = 95% of the data. + & - 3 = 99. 7% of the data. Very unusual values are >3 or