That database lists persons registered as leaving Biri between 1814-1901. The child Marit Johansdatter does not appear to be listed as connected with anyone else in that particular database - whether because of the database structure or some other reason - perhaps the original record could not be read, etc.
But the database does clearly tell you that Marit was baptised in Biri church 18 April 1822. If you were to order LDS microfilm copy of the 1822 baptisms in the Biri Oppland church (film #0125453) - you should find a record which will list the names of her parents and probably the name of their residence (farm).
How-to read and use the Norwegian church records -- http://homepages.rootsweb.com/~norway/na20.html