Statistical Analysis – Part 3

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Presentation transcript:

Statistical Analysis – Part 3 10/14/2018 Statistical Analysis – Part 3 Yale Braunstein School of Information Statistical Analysis - 3

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) 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

General Concerns Reliability Repeated measures of the same condition are reasonably similar Validity Statistic measures what it purports to measure (worries about systematic error & bias)

Specific SPSS Topics Covered Descriptive statistics Frequencies Histograms Cross-tabulations Value labels Recoding & transforming data Missing data or observations Other stuff: Scatterplots

Scatterplots in SPSS 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