Modeling Distributions of Data Describing location in a distribution Chapter 2.1.

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CHAPTER 2 Modeling Distributions of Data

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Presentation transcript:

Modeling Distributions of Data Describing location in a distribution Chapter 2.1

Percentile The pth percentile of a distribution is the value with p percent of the observations less than it. Test scores example: What percentile is a score of 89? 85? 69?

Cumulative Relative Frequency Graphs “Ogives” The following table shows the ages of people on a commuter train one morning. Draw an ogive to show this information. Lets start by making a cumulative frequency table Age # of People

Age# of People Cumulative Frequency% =

Age# of People Cumulative Frequency% =