getMuVar {bhmbasket} | R Documentation |

## getMuVar

### Description

This function returns the variance of `\mu`

that is worth a certain number
of subjects for the distribution of the response rates.

### Usage

```
getMuVar(response_rate, tau_scale, n_worth = 1)
```

### Arguments

`response_rate` |
A numeric for the response rate |

`tau_scale` |
A numeric for the scale parameter of the Half-normal distribution of |

`n_worth` |
An integer for the number of subjects the variance of |

### Details

Calculates the variance `mu_var`

in

```
logit(p) = \theta ~ N(\mu, \tau),
\mu ~ N(mu_mean, mu_var), \tau ~ HN(tau_scale),
```

for `n_worth`

number of observations, as in Neuenschwander et al. (2016).

### Value

Returns a numeric for the variance of `\mu`

### Author(s)

Stephan Wojciekowski

### References

Neuenschwander, Beat, et al. "Robust exchangeability designs
for early phase clinical trials with multiple strata."
*Pharmaceutical statistics* 15.2 (2016): 123-134.

### Examples

```
getMuVar(response_rate = 0.3,
tau_scale = 1)
getMuVar(response_rate = 0.3,
tau_scale = 1,
n_worth = 2)
```

*bhmbasket*version 0.9.5 Index]