Chapter 2 Slides

Chapter 2 Slides - Chapter 2: Description Statistics:...

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Chapter 2: Description Statistics: Tabular and Graphical Presentations
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Learning Objectives Recognize which summaries are used for Quantitative or for Qualitative Data. Construct a frequency table, bar graph and pie chart for qualitative data. Convert raw data into a data array. Construct frequency table, relative and cumulative frequency tables, and histogram for quantitative data. Construct a stem-and-leaf display to represent quantitative data.
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Introduction Data are usually collected, entered, and saved into some form of database. We want to summarize/reduce the data to a form which is more easily interpreted and which will aid in decision-making. Many summaries are found in newspapers, magazines, internet, annual reports, and research studies
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Summarizing Qualitative Frequency Distribution - a tabular summary of a data showing the frequency of items in each of several distinct categories. Major Frequencies Relative Frequencies (%freq) ISDS 24 0.253 (25.3) FIN 9 0.095 (9.5) MKT 15 0.158 (15.8) ACCT 7 0.074 (7.4) PBADM 40 0.421 (42.1) TOTAL 95 1.001
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A graphical representation of data where each category is depicted by a bar representing the frequency or proportion of observations falling into a category. ISDS 2000 - FALL 2001
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Chapter 2 Slides - Chapter 2: Description Statistics:...

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