# type I error rate of a GSD

### Description

`typeIerr`

is a function that computes the type I error rate of a GSD.

### Usage

1 | ```
typeIerr(GSD)
``` |

### Arguments

`GSD` |
object of the |

### Value

`typeIerr`

returns the type I error rate of a GSD.

### Author(s)

Niklas Hack niklas.hack@meduniwien.ac.at and Werner Brannath werner.brannath@meduniwien.ac.at

### References

O'Brien, PC, Fleming, TR (1979) ”A multiple testing procedure for clinical trials”,
*Biometrics*, 35 , 549-556

Schoenfeld, D (2001) ”A simple Algorithm for Designing Group Sequential Clinical Trials”,
*Biometrics*, 27, 972-974

### See Also

`GSTobj`

### Examples

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