(See related pages)
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| Chapter-Specific | ||
| Causal-Comparative Research | ||
| Take an online tour through causal-comparative research designs, control procedures, and data analysis techniques. ( http://www.mnstate.edu/wasson/ed603/ed603lesson12.htm ) | ||
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| Frequency Polygons | ||
| Learn how to create a frequency polygon using frequency table data. Includes charts and examples. ( http://davidmlane.com/hyperstat/A49236.html ) | ||
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| Introduction to t-tests | ||
| Describes types of t-tests, determining statistical significance, and type I and type II errors. Links to an Excel spreadsheet that calculates t-values and other relevant information. ( http://www.statcan.ca/english/edu/power/ch9/scattergraphs/scatter.htm ) | ||
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| Robustness Simulation | ||
| This applet lets you explore type I error and power of t tests (and two-group analysis of variance). Change the skew to investigate the effect of violating the normality assumption. Change the population standard deviations to investigate the effect of violating the assumption of homogeneity of variance. Press the "Begin" button to start the simulation. ( http://www.ruf.rice.edu/~lane/stat_sim/robustness/index.html ) | ||
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