On Production Server...
Create stats table using...
SQL> EXEC DBMS_STATS.CREATE_STAT_TABLE(ownname=> 'PROD_SCHEMA', stattab=>'STATS_08JAN2016');
Export statistics using..
SQL> EXEC DBMS_STATS.EXPORT_SCHEMA_STATS(ownname => 'PROD_SCHEMA',stattab => 'STATS_08JAN2016');
Export the stats table using...
expdp dumpfile=DPUMP_DIR1:Prod_statistics.dmp logfile=DPUMP_DIR1:Prod_statistics.log tables=PROD_SCHEMA.STATS_08JAN2016
scp the dump file to the destination server...
Now on the destionation server...
Import the table into the destination database using...
impdp dumpfile=DPUMP_DIR1:Prod_statistics.dmp logfile=DPUMP_DIR1:Prod_stats_into_Test.log remap_schema=PROD_SCHEMA:TEST_SCHEMA full=y table_exists_action=truncate
Update the statistics table to reflect the target schema...this step is required if the target schema is different from source(prod) schema
UPDATE TEST_SCHEMA.STATS_08JAN2016 SET C5='TEST_SCHEMA' WHERE C5='PROD_SCHEMA';
Import the schema level statistics using...
EXEC DBMS_STATS.IMPORT_SCHEMA_STATS(ownname => 'TEST_SCHEMA', stattab => 'STATS_08JAN2016');