Satterthwaite’s Approximation for Degrees of Freedom Art Instruction Effect on Reading Development J.C. Mills (1973), “The Effect of Art Instruction Upon.

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Presentation transcript:

Satterthwaite’s Approximation for Degrees of Freedom Art Instruction Effect on Reading Development J.C. Mills (1973), “The Effect of Art Instruction Upon a Reading Development Test: An Experimental Study with Rural Appalachian Children,” Studies in Art Education, Vol. 14, #3, pp.4-8

Setting Comparing Means from 2 Normal Distributions Small Samples (Computer Packages Solve for any sizes) Distributions have Possibly Different Variances

Case 1 – Variances are Equal

Case 2 – Variances are Unequal - I

Case 2 – Variances are Unequal - II

Example – Art Instruction Effect on Reading Experiment to Determine Effect of Art Instruction on a Reading Development Test  52 Children Given Baseline Reading Test  26 Received Art Instruction (Trt), 26 Did not (Control)  Y=Post-Test – Pre-Test Score

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