2455029912

Figurę 3. Change in Special Education Autism Category Prevalence between 2002 and 2008 vs Baseline (2002) Prevalence, Wisconsin Elementary School Districts (with weighted linear best-fit linę and 95% confidence band)

Change in Special Education Autism Category Prevalence (per 1,000)

between 2002 and 2008

30-

20-

10-

0-

-10-

2002 District Elementary School Population

•    250

•    500

•    1000

0    10000

50000

2002 Special Education Autism Category Prevalence Octile

• 1

• 2

3

4

5

6 7

-20-

l    i    i    l    l    i

0    5    10    15    20    25

2002 Special Education Autism Category Prevalence (per 1,000)

• 8