Ch2Notes

# Ch2Notes - Ch2. Tabular and graphical presentation Topics:...

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Ch2. Tabular and graphical presentation Topics: 1). Describe qualitative data 2). Describe quantitative data 3). Scatter Diagram HW2: 3, 9, 19 (similar to 15), 30 I. Describe qualitative data. 1. Frequency table 1). Frequency, relative frequency, percent frequency a. frequency: count how frequent; b. relative frequency: fraction or proportion of the total number of data items belonging to the class. relative freq=frequency/sample size c. percent frequency: relative frequency*100 2). examples: K-mart wants to see customers' preference to shampoo. They asked 10 random customers, and got their favorite shampoo brand as below: Pantene, head & shoulder, Pentene, Aussie, Pentene, Aussie, Vive, Aussie, head & shoulder, and Pantene.

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Frequency Relative freq. Percent freq. Pantene 4 head & shoulder 2 Aussie 3 Vive 1 Total 10 2. Bar graph: 1). horizontal axis: we specify the labels that are used for each of the classes. 2). vertical axis: frequency, relative frequency, or percent frequency scale. 3). discrete bars with fixed width represent each class. bar graph for the example above
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## This note was uploaded on 10/05/2010 for the course FIN 3000 taught by Professor Ackute during the Spring '10 term at Kennesaw.

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Ch2Notes - Ch2. Tabular and graphical presentation Topics:...

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