Block-level descriptive statistics by public- and nonpublic-school sessions, as defined after scaling, grade 12 U.S. history national main assessment (accommodations permitted [R3]): 2001
Statistic |
Type of school1 |
Block H3 |
Block H4 |
Block H5 |
Block H6 |
Block H7 |
Block H8 |
Block H9 |
Block H10 |
Block H11 |
Number of scaled items |
† |
17 |
18 |
18 |
17 |
16 |
17 |
16 |
16 |
16 |
Unweighted sample size |
Public |
2,000 |
2,000 |
2,100 |
2,000 |
2,000 |
2,000 |
2,000 |
2,000 |
2,000 |
Nonpublic |
200 |
300 |
200 |
200 |
300 |
300 |
200 |
300 |
300 |
Weighted average item score |
Public |
0.43 |
0.40 |
0.46 |
0.42 |
0.45 |
0.45 |
0.54 |
0.48 |
0.56 |
Nonpublic |
0.50 |
0.49 |
0.55 |
0.45 |
0.53 |
0.52 |
0.65 |
0.55 |
0.60 |
Weighted average polyserial |
Public |
0.57 |
0.57 |
0.52 |
0.57 |
0.59 |
0.56 |
0.56 |
0.56 |
0.67 |
Nonpublic |
0.54 |
0.56 |
0.52 |
0.50 |
0.62 |
0.55 |
0.58 |
0.53 |
0.63 |
Weighted alpha reliability |
Public |
0.76 |
0.77 |
0.76 |
0.74 |
0.77 |
0.76 |
0.74 |
0.71 |
0.84 |
Nonpublic |
0.72 |
0.77 |
0.75 |
0.66 |
0.79 |
0.74 |
0.76 |
0.67 |
0.82 |
Weighted proportion of students attempting last item2
| Public |
0.94 |
0.88 |
0.96 |
0.98 |
0.98 |
0.97 |
0.99 |
0.93 |
0.92 |
Nonpublic |
0.97 |
0.89 |
0.98 |
0.98 |
0.97 |
0.97 |
1.00 |
0.96 |
0.96 |
Last updated 11 July 2008 (DB)
Printer-friendly Version
|