年龄

标 准 差

(月)

-3SD

-2SD

-1SD

中位数

+1SD

+2SD

+3SD

0

2.0

2.4

2.9

3.3

3.8

4.3

4.8

1

2.2

2.9

3.6

4.3

5.0

5.6

6.3

2

2.6

3.5

4.3

5.2

6.0

6.8

7.6

3

3.1

4.1

5.0

6.O

6.9

7.7

8.6

4

3.7

4.7

5.7

6.7

7.6

8.5

9.4

5

4.3

5.3

6.3

7.3

8.2

9.2

10.1

6

4.9

5.9

6.9

7.8

8.8

9.8

10.8

7

5.4

6.4

7.4

8.3

9.3

10.3

11.3

8

5.9

6.9

7.8

8.8

9.8

10.8

11.8

9

6.3

7.2

8.2

9.2

10.2

11.3

12.3

10

6.6

7.6

8.6

9.5

10.6

11.7

12.7

11

6.9

7.9

8.9

9.9

10.9

12.0

13.1

12

7.1

8.1

9.1

10.2

11.3

12.4

13.5

13

7.3

8.3

9.4

10.4

11.5

12.7

13.8

14

7.5

8.5

9.6

10.7

11.8

13.0

14.1

15

7.6

8.7

9.8

10.9

12.0

13.2

14.4

16

7.7

8.8

10.0

11.1

12.3

13.5

14.7

17

7.8

9.0

10.1

11.3

12.5

13.7

14.9

18

7.9

9.1

10.3

11.5

]2.7

13.9

15.2

19

8.0

9.2

10.5

11.7

12.9

14.1

15.4

20

8.1

9.4

10.6

11.8

13.1

14.4

15.6

21

8.3

9.5

10.8

12.0

13.3

14.6

15.8

22

8.4

9.7

10.9

12.2

13.5

14.8

16.0

23

8.5

9.8

11.1

12.4

13.7

15.0

16.3

24

8.6

9.9

11.3

12.6

13.9

15.2

16.5

25

8.7

10.1

11.4

12.8