Description Usage Arguments Value Author(s) References See Also Examples

`samplesize.h`

determines the sample size, when specified the effect size to be detected, desired statistical power, and significance level.
`samplesize.h`

always specifies two-sided test.

1 | ```
samplesize.h(delta, power = 0.8, sig.level = 0.05)
``` |

`delta` |
a numeric contains the effect size (Cohen's |

`power` |
a numeric contains the desired statistical power (default 0.80) |

`sig.level` |
a numeric contains the significance level (default 0.05) |

Return a numeric containing the appropriate sample size in each group.

Yasuyuki Okumura

Department of Social Psychiatry,

National Institute of Mental Health,

National Center of Neurology and Psychiatry

[email protected]

Cohen J (1988). Statistical power analysis for the behavioral sciences (2nd ed). Hillsdale, NJ: Erlbaum.

1 2 3 4 5 | ```
##Cohen (1988) ex.6.7
samplesize.h(delta=.20, power=.90, sig.level=.01)
##Cohen (1988) ex.6.8
samplesize.h(delta=.2828, power=.95, sig.level=.05)
``` |

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