Stats 10 9

Stats 10 9 - Symmetric and Skewed Left/right skewed Other...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Stats 10 9/29 Examining Distrubutions of numerical variables What is the typical value? (center) How much variability is there (Spread) What is the shape? Are there unusual features? What to look for in a numerical graph Shape, Center, Spread. Shape – is it symmetric? Skewed? What’s the typical value? Look at the center value – mode How much variability? Does typical tell the whole story? – how spread out are the values on the graph Basic Shapes
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Symmetric and Skewed Left/right skewed Other shape issues Bi modal ( two humps) suggests two diverse groups combined into sample Outlier a point or points separated from the bulk of the data. Calls for investigation. Can suggest existence of another group ( like bimodal) or might be a mistake Put a number on it For symmetric distrubtions the sample mean and sample standard deviation measure center and spread....
View Full Document

This note was uploaded on 09/16/2011 for the course STATS 10 taught by Professor Ioudina during the Spring '08 term at UCLA.

Ask a homework question - tutors are online