Publication Date

In 2022 | 0 |

Since 2021 | 0 |

Since 2018 (last 5 years) | 0 |

Since 2013 (last 10 years) | 1 |

Since 2003 (last 20 years) | 3 |

Descriptor

Hypothesis Testing | 5 |

Evaluation Methods | 2 |

Probability | 2 |

Sampling | 2 |

Bayesian Statistics | 1 |

Comparative Analysis | 1 |

Computation | 1 |

Correlation | 1 |

Data Analysis | 1 |

Data Interpretation | 1 |

Effect Size | 1 |

More ▼ |

Source

Educational and Psychological… | 5 |

Author

Wilcox, Rand R. | 5 |

Serang, Sarfaraz | 1 |

Publication Type

Journal Articles | 5 |

Reports - Evaluative | 3 |

Reports - Research | 2 |

Numerical/Quantitative Data | 1 |

Education Level

Audience

Location

Laws, Policies, & Programs

Assessments and Surveys

What Works Clearinghouse Rating

Wilcox, Rand R.; Serang, Sarfaraz – Educational and Psychological Measurement, 2017

The article provides perspectives on p values, null hypothesis testing, and alternative techniques in light of modern robust statistical methods. Null hypothesis testing and "p" values can provide useful information provided they are interpreted in a sound manner, which includes taking into account insights and advances that have…

Descriptors: Hypothesis Testing, Bayesian Statistics, Computation, Effect Size

Wilcox, Rand R. – Educational and Psychological Measurement, 2006

Consider the nonparametric regression model Y = m(X)+ [tau](X)[epsilon], where X and [epsilon] are independent random variables, [epsilon] has a median of zero and variance [sigma][squared], [tau] is some unknown function used to model heteroscedasticity, and m(X) is an unknown function reflecting some conditional measure of location associated…

Descriptors: Nonparametric Statistics, Mathematical Models, Regression (Statistics), Probability

Wilcox, Rand R. – Educational and Psychological Measurement, 2006

For two random variables, X and Y, let D = X - Y, and let theta[subscript x], theta[subscript y], and theta[subscript d] be the corresponding medians. It is known that the Wilcoxon-Mann-Whitney test and its modern extensions do not test H[subscript o] : theta[subscript x] = theta[subscript y], but rather, they test H[subscript o] : theta[subscript…

Descriptors: Scores, Inferences, Comparative Analysis, Statistical Analysis

Peer reviewed

Wilcox, Rand R. – Educational and Psychological Measurement, 1983

When comparing k normal populations an investigator might want to know the probability that the population with the largest population mean will have the largest sample mean. This paper describes and illustrates methods of approximating this probability when the variances are unknown and possibly unequal. (Author/BW)

Descriptors: Data Analysis, Hypothesis Testing, Mathematical Formulas, Probability

Peer reviewed

Wilcox, Rand R. – Educational and Psychological Measurement, 1980

When analyzing a squared multiple correlation coefficient, an investigator may be interested in determining whether it is above or below a known constant, rather than testing the null hypothesis. This paper gives the sample sizes required for answering this question when indifference zone formulation of the problem is used. (Author/BW)

Descriptors: Correlation, Hypothesis Testing, Sampling