Unit 3: Central Tendency and Variability Download all videos in a zip file.

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Objectives and Lecture Notes

Reading Assignment: Aron Chapter 23. Describe and compute variance and standard deviation from a distribution of scores.

4. Recognize the APA and text symbols used for mean, variance, and standard deviation.

6. Interpret graphs and tables using means and standard deviations. (Flash on means in figures and tables; no video.)

Tutorials

1. Computation of Means and Variance.

2. Compute Means and Variance with Excel

3. Representing Means in figures and tables.

4. Compute mean, median, mode, SD and variance, and save z scores in SPSS