Define prior (assumed) model parameter as log-normally-distributed.
Used in the `cbc_choices()`

function.

`randLN(mean = 0, sd = 1)`

- mean
Mean of the distribution on the log scale, defaults to

`0`

.- sd
Standard deviation of the distribution on the log scale, defaults to

`1`

.

A list defining log-normally-distributed parameters of the prior
(assumed) utility model used to simulate choices in the `cbc_choices()`

function.

```
# Insert example
```