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| Teaching Statistics: An… | 3 |
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| Hayes, Kevin | 3 |
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Peer reviewed
Direct linkHayes, Kevin – Teaching Statistics: An International Journal for Teachers, 2012
This article provides an easy derivation of updating formulae for the sample covariance and, by extension, for the Pearson product-moment correlation coefficient.
Descriptors: Correlation, Statistical Analysis, Mathematical Formulas, Sampling
Hayes, Kevin – Teaching Statistics: An International Journal for Teachers, 2010
This article considers prototype data sets that attain lower and upper bounds on the standard deviation in terms of the range.
Descriptors: Statistics, Measurement, Statistical Data
Hayes, Kevin – Teaching Statistics: An International Journal for Teachers, 2004
This article demonstrates that the lower bound for the most deviant Z score and the upper bound for the sample standard deviation are attained simultaneously.
Descriptors: Statistical Analysis, Scores, Item Response Theory, Probability
