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Technical School First Cycle
11501 - 11505
Stats: Sample Size Determination
This resource, from James Jones at Richland Community College, provides the user with a formula for obtaining sample sizes of a mean and proportion. Click the "Table of Contents" link to view all of Jones' lecture...
Friedman Test: For k = 3
Nonparametric test for the significance of the difference among the distributions of k correlated samples (A, B, etc., each of size n) involving repeated measures or matched sets. As the page opens, you will be prompted...
Spearman Rank Order Correlation Coefficient
This page will calculate r_s , the Spearman rank- order correlation coefficient, for a bivariate set of paired XY rankings. As the page opens, you will be prompted to enter the number of items for which there are...
This resource, by Gerard Dallal of Tufts University, assists the user in reading, constructing, and understanding confidence intervals. The site presents six cases as examples and discusses each one.
Point Biserial Correlation Coefficient
This page calculates the point biserial correlation coefficient for the case where one variable is dichotomous and the other is non-dichotomous. This page allows the user to input the data directly or copy and paste...
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