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**TrialSize**: R functions in Chapter 3,4,6,7,9,10,11,12,14,15**InterSV.Equality**: Test for Equality of Inter-Subject Variabilities

# Test for Equality of Inter-Subject Variabilities

### Description

H0: between-subject variance of treatment T is equal to between-subject variance of treatment R

Ha: not equal

The test is finding whether two drug products have the same inter-subject variability.

### Usage

1 | ```
InterSV.Equality(alpha, beta, vbt, vwt, vbr, vwr, m)
``` |

### Arguments

`alpha` |
significance level |

`beta` |
power = 1-beta |

`vbt` |
between-subject variance of treatment T |

`vwt` |
within-subject variance of treatment T |

`vbr` |
between-subject variance of treatment R |

`vwr` |
within-subject variance of treatment R |

`m` |
for each subject, there are m replicates. |

### References

Chow SC, Shao J, Wang H. Sample Size Calculation in Clinical Research. New York: Marcel Dekker, 2003

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