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# Statistical Analysis Part 3 - PowerPoint PPT Presentation

Statistical Analysis – Part 3. Yale Braunstein School of Information. Histograms in Excel. Since this is not obvious from the menus or help, the following may be of use Install the Analysis Tool Pack Add-in (Tools/Add-ins/Analysis ToolPack)

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### Statistical Analysis – Part 3

Yale Braunstein

School of Information

• Since this is not obvious from the menus or help, the following may be of use

• This depends on which options you originally installed with Excel

• Then use Tools/Data Analysis/Histogram

• You can only get help on histograms from the Histogram pop-up window

• See the Oakland sample file for an illustration of the use of ”bins” & chart output

• Reliability

• Repeated measures of the same condition are reasonably similar

• Validity

• Statistic measures what it purports to measure

• (worries about systematic error & bias)

• Descriptive statistics

• Frequencies

• Histograms

• Cross-tabulations

• Value labels

• Recoding & transforming data

• Missing data or observations

• Other stuff: Scatterplots

• Scatterplots can be useful to present two numerical variables (non-categorical) and show the possible relationship between them.

• Commands

• Graphs / Scatter / Simple

• To add regression line, go to output window, double-click on graph, use Chart / Options / Fit Line