.. _variables-lognormal_uncertain-parameters-option_1:

""""""""
option_1
""""""""


Specify means and standard deviations for the lognormal distributions



.. toctree::
   :hidden:
   :maxdepth: 1

   variables-lognormal_uncertain-parameters-option_1-means
   variables-lognormal_uncertain-parameters-option_1-std_deviations


**Specification**

- *Alias:* None

- *Arguments:* None


**Child Keywords:**

+-------------------------+--------------------+--------------------+-----------------------------------------------+
| Required/Optional       | Description of     | Dakota Keyword     | Dakota Keyword Description                    |
|                         | Group              |                    |                                               |
+=========================+====================+====================+===============================================+
| Required                                     | `means`__          | First parameter of the lognormal distribution |
|                                              |                    | (options 1 & 2)                               |
+----------------------------------------------+--------------------+-----------------------------------------------+
| Required                                     | `std_deviations`__ | Second parameter of the lognormal             |
|                                              |                    | distribution (option 1)                       |
+----------------------------------------------+--------------------+-----------------------------------------------+

.. __: variables-lognormal_uncertain-parameters-option_1-means.html
__ variables-lognormal_uncertain-parameters-option_1-std_deviations.html



**Description**



Select the first option for parameterization (means and standard deviations)