Abstract
This chapter describes permutation statistical methods for measures of association designed for two or more interval-level variables. Included in this chapter are simple and multiple ordinary least squares (OLS) regression, simple and multiple least absolute deviation (LAD) regression, point-biserial correlation, and biserial correlation. Fisher’s Z transform for non-normal distributions is examined and evaluated. This chapter concludes with a discussion of the intraclass correlation coefficient.
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Notes
- 1.
In this chapter, a caret (∧) over a symbol such as \(\hat {\alpha }\) or \(\hat {\beta }\) indicates an OLS regression model predicted value of a corresponding population parameter, while a tilde (∼) over a symbol such as \(\tilde {\alpha }\) or \(\tilde {\beta }\) indicates a LAD regression model predicted value of a corresponding population parameter.
- 2.
For comparison, the top of Mount Everest is approximately 8.85 km with a pressure of about 300 millibars.
- 3.
- 4.
It is probably safe to assume that in any actual research situation, the population correlation coefficient is always not equal to zero.
- 5.
- 6.
For many years height has been considered as normally distributed, but recent research indicates that this is not necessarily the case [30, pp. 205–207].
- 7.
Note that the sum of squared deviation is divided by N, not N − 1 and the symbol for the standard deviation is S y with an uppercase letter S to distinguish it from the usual sample standard deviation denoted by s y.
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Berry, K.J., Johnston, J.E., Mielke, P.W. (2018). Interval-Level Variables. In: The Measurement of Association. Springer, Cham. https://doi.org/10.1007/978-3-319-98926-6_7
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