Statistical Analysis

1
Statistical Analysis Part 2

• Yale Braunstein
• School of Information

2
Measures of Central Tendency

• Distinguish between numerical categorical data
• Understand the differences between the different
  measures of the average
• Mean
• Median (middle value)
• Mode (most common value)
• Example David Lazarus on PGE bonus payments,SF
  Gate, March 12, 2003.
• Consider the dispersion around the center

3
Demos of Excel SPSS

• Sample data sets available from the Resources
  page
• Student height weight
• Oakland voter profile
• U.S. colleges (with detailed comparison of 4
  private colleges)
• There are also links to
• Comparison of Excel SPSS
• MS for Pivot Table Reports 101
• SPSS flow of logic handout
• SPSS FAQ

4
Specific Topics Covered

• Measures of central tendency (various forms of
  averages)
• Frequencies
• Histograms
• Cross-tabulations
• Value labels
• Recoding transforming data
• Missing data or observations
• Documenting data files, transformations,
  procedures, etc.
• The last 5 are some of the strengths of SPSS