System_Privileges.htm
Ref: Oracle Release 11.2.1

A list of 46(!!) entries, has shown below, system privileges do not relate to a specific schema or object. ( Please review these documents, Oracle_Privileges2.htm Oracle_Privileges3.htm )
ADMIN
ALTER ANY CACHE GROUP
ALTER ANY INDEX
ALTER ANY MATERIALIZED VIEW
ALTER ANY PROCEDURE
ALTER ANY SEQUENCE
ALTER ANY TABLE
ALTER ANY VIEW
CACHE_MANAGER
CREATE ANY CACHE GROUP
CREATE ANY INDEX
CREATE ANY MATERIALIZED VIEW
CREATE ANY PROCEDURE
CREATE ANY SEQUENCE
CREATE ANY SYNONYM
CREATE ANY TABLE
CREATE ANY VIEW
CREATE CACHE GROUP
CREATE MATERIALIZED VIEW
CREATE PROCEDURE
CREATE PUBLIC SYNONYM
CREATE SEQUENCE
CREATE SESSION
CREATE SYNONYM
CREATE TABLE
CREATE VIEW
DELETE ANY TABLE
DROP ANY CACHE GROUP
DROP ANY INDEX
DROP ANY MATERIALIZED VIEW
DROP ANY PROCEDURE
DROP ANY SEQUENCE
DROP ANY SYNONYM
DROP ANY TABLE
DROP ANY VIEW
DROP PUBLIC SYNONYM
EXECUTE ANY PROCEDURE
FLUSH ANY CACHE GROUP
INSERT ANY TABLE
LOAD ANY CACHE GROUP
REFRESH ANY CACHE GROUP
SELECT ANY SEQUENCE
SELECT ANY TABLE
UNLOAD ANY CACHE GROUP
UPDATE ANY TABLE
XLA
Note: By default , SYSTEM user doesn’t have the privilege to analyze any non system table (Other schema’s table).

For the system user, to  ANALYZE ANY  non system tables (other schema tables), you must render system user with "grant ANALYZE ANY to system " after login in as  user/ as sysdba. 

 SQL>Baba / as sysdba
Connected.
SQL> grant ANALYZE ANY to system;
Grant succeeded.
Example :

SELECT USERNAME, GRANTED_ROLE, DEFAULT_ROLE
FROM
USER_ROLE_PRIVS
WHERE USERNAME = 'SYSTEM'

Note:  Mr. Scott had fewer roles, (by default)