HWM question after delete

[learning_bee]

SQL> ALTER TABLE TEST.TEST move storage (minextents 1);

Table altered.

Elapsed: 00:00:00.04
SQL> SELECT tablespace_name "Tablespace Name",  
  2  bytes/1048576 "Size(M)" 
  3  FROM dba_segments
  4  where owner='TEST';

Tablespace Name                                                                               Size(M
------------------------------------------------------------------------------------------ ---------
TEST_DATA                                                                                         100.5
TEST_DATA                                                                                        48.5
TEST_DATA                                                                                        56.5

Elapsed: 00:00:00.01
SQL> analyze table TEST compute statistics;

Table analyzed.

Elapsed: 00:00:00.00
SQL> SELECT tablespace_name "Tablespace Name",  
  2  bytes/1048576 "Size(M)" 
  3  FROM dba_segments
  4  where owner='TEST';

Tablespace Name                                                                               Size(M
------------------------------------------------------------------------------------------ ---------
TEST_DATA                                                                                         100.5
TEST_DATA                                                                                        48.5
TEST_DATA                                                                                        56.5

Elapsed: 00:00:00.01
SQL>

nothing is changing.