Variance Estimates and the F Ratio

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Evaluating the F Ratio
The Sampling Distribution of F A frequency distribution of a statistic (e.g., F) is called a sampling distribution of the statistic. Suppose that for an experiment a = 3, n = 5 (or N = 15), and the null hypothesis is true so that μ 1 = μ 2 = μ 3 . Assume that we draw a very large number of such experiments each consisting of three groups of 5 scores, and that we compute the value of F for each case. We can construct a graph relating F and frequency of occurrence [see Figure 3-1 for F(2,12)].
Page 1 and 2: VARIANCE ESTIMATES AND THE F RATIO
Page 3 and 4: Completing the Analysis The ANOVA T
Page 5 and 6: Degrees of Freedom The degree of f
Page 7 and 8: Mean Squares The mean squares are
Page 9: The F Ratio The formula of the F r
Page 13 and 14: Using the F Table A particular val
Page 15 and 16: Testing the Null Hypothesis The tw
Page 17 and 18: Decision Rules This probability ma
Page 19 and 20: Errors in Hypothesis Testing
Page 21 and 22: A Complete Numerical Example
Page 23 and 24: Data (computation p. 51) Hours with
Page 25: Next Class SPSS Introduction

Variance Estimates and the F Ratio

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