Oracle PL/SQL/Analytical Functions/STATS WSR TEST
STATS_WSR_TEST(expr1, expr2, "ONE_SIDED_SIG"): For one-tailed significance level
<source lang="sql">
SQL> SQL> create table TestTable (
2 x number primary key, 3 y number 4 );
Table created. SQL> insert into TestTable values (1, 7 ); 1 row created. SQL> insert into TestTable values (2, 1 ); 1 row created. SQL> insert into TestTable values (3, 2 ); 1 row created. SQL> insert into TestTable values (4, 5 ); 1 row created. SQL> insert into TestTable values (5, 7 ); 1 row created. SQL> insert into TestTable values (6, 34 ); 1 row created. SQL> insert into TestTable values (7, 32 ); 1 row created. SQL> insert into TestTable values (8, 43 ); 1 row created. SQL> insert into TestTable values (9, 87 ); 1 row created. SQL> SQL> select * from TestTable;
X Y
----------
1 7
2 1
3 2
4 5
5 7
6 34
7 32
8 43
9 87
9 rows selected. SQL> SQL> -- STATS_WSR_TEST(expr1, expr2, "ONE_SIDED_SIG"): For one-tailed significance level SQL> SQL> -- STATS_WSR_TEST(expr1, expr2, "ONE_SIDED_SIG") SQL> SQL> SQL> SELECT STATS_WSR_TEST(y, x, "ONE_SIDED_SIG") FROM TestTable; STATS_WSR_TEST(Y,X,"ONE_SIDED_SIG")
.013923976
SQL> SQL> drop table TestTable; Table dropped. SQL> SQL> SQL>
</source>
STATS_WSR_TEST(expr1, expr2, "TWO_SIDED_SIG"): For two-tailed significance level
<source lang="sql">
SQL> SQL> SQL> create table TestTable (
2 x number primary key, 3 y number 4 );
Table created. SQL> insert into TestTable values (1, 7 ); 1 row created. SQL> insert into TestTable values (2, 1 ); 1 row created. SQL> insert into TestTable values (3, 2 ); 1 row created. SQL> insert into TestTable values (4, 5 ); 1 row created. SQL> insert into TestTable values (5, 7 ); 1 row created. SQL> insert into TestTable values (6, 34 ); 1 row created. SQL> insert into TestTable values (7, 32 ); 1 row created. SQL> insert into TestTable values (8, 43 ); 1 row created. SQL> insert into TestTable values (9, 87 ); 1 row created. SQL> SQL> select * from TestTable;
X Y
----------
1 7
2 1
3 2
4 5
5 7
6 34
7 32
8 43
9 87
9 rows selected. SQL> SQL> -- STATS_WSR_TEST(expr1, expr2, "TWO_SIDED_SIG"): For two-tailed significance level SQL> SQL> -- STATS_WSR_TEST(expr1, expr2, "TWO_SIDED_SIG") SQL> SQL> SQL> SELECT STATS_WSR_TEST(y, x, "TWO_SIDED_SIG") FROM TestTable; STATS_WSR_TEST(Y,X,"TWO_SIDED_SIG")
.027847953
SQL> SQL> drop table TestTable; Table dropped. SQL> SQL> SQL>
</source>
STATS_WSR_TEST(y, x, "STATISTIC"): Wilcoxon Signed Ranks test tests whether medians of two populations are significantly different
<source lang="sql">
SQL> SQL> SQL> create table TestTable (
2 x number primary key, 3 y number 4 );
Table created. SQL> insert into TestTable values (1, 7 ); 1 row created. SQL> insert into TestTable values (2, 1 ); 1 row created. SQL> insert into TestTable values (3, 2 ); 1 row created. SQL> insert into TestTable values (4, 5 ); 1 row created. SQL> insert into TestTable values (5, 7 ); 1 row created. SQL> insert into TestTable values (6, 34 ); 1 row created. SQL> insert into TestTable values (7, 32 ); 1 row created. SQL> insert into TestTable values (8, 43 ); 1 row created. SQL> insert into TestTable values (9, 87 ); 1 row created. SQL> SQL> select * from TestTable;
X Y
----------
1 7
2 1
3 2
4 5
5 7
6 34
7 32
8 43
9 87
9 rows selected. SQL> SQL> --STATS_WSR_TEST(y, x, "STATISTIC"): Wilcoxon Signed Ranks test tests whether medians of two populations are significantly different. SQL> SQL> SQL> SELECT STATS_WSR_TEST(y, x, "STATISTIC") FROM TestTable; STATS_WSR_TEST(Y,X,"STATISTIC")
-2.1994217
SQL> SQL> drop table TestTable; Table dropped. SQL> SQL> SQL>
</source>
