Chapter 3

Chapter 3 - Chapter 3: Graphical Displays of Data Raw Data-...

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Unformatted text preview: Chapter 3: Graphical Displays of Data Raw Data- initial list of the observations for each variable Frequency Table – table containing each category value, or class of values that a variable might have and the number of times each one occurs in the data. The frequency table of the i th class is denoted f i . Relative Frequency – number of times an observation falls into that classification represented as a portion of the total number of observations. It can be expressed as a fraction, decimal, or percentage. Cumulative Relative Frequency – the sum of the relative frequencies of all classes at or below that class represented as a portion of the total number of observations. It can be expressed as a fraction, decimal or percentage. When using statistics or spreadsheet software to analyze data, the cumulative frequencies are part of the output, which makes it a much easier job. Certain statistical tables such as probability tables are cumulative and there is just no other way to...
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This note was uploaded on 04/18/2008 for the course ECON 205 taught by Professor Diagne during the Fall '07 term at Towson.

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