## Statistical power analysis for the behavioral sciences |

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### Contents

The t Test for Means | 19 |

The Significance of a Product Moment | 75 |

Differences between Correlation Coefficients | 109 |

Copyright | |

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99 Table alternate hypothesis analysis of covariance analysis of variance approximately Assume behavioral science cell Chapter Cohen & Cohen column g computed consider contingency tables conventional defined denominator df departure described desired power detect determine effect size equal equivalent error experiment F test factorial design finds power formula function given hence Illustrative Examples implies interaction investigator larger linear interpolation main effects measure nondirectional normal distribution Note null hypothesis operational definitions pairs parameter population means population membership posited power analysis Power of F power tables power values problem procedure psychologist range ratio regression rejecting the null relationship row power RY.B sample size tables scale Section significance criterion significance test specifications standard deviation statistical power statistical test subtable of Table T-ble tion Type II error variance accounted x2 test yield zero