Cedar Rapids 2000-2001 ITBS Scores

 

School % Supported
Lunch
Observed
(National)
Predicted
(National)
Residual Significance
Polk 84 15 17.9 -2.9 NS
Harrison 51 29 46.3 -17.3 ***
Taylor 72 26 28.2 -2.2 NS
Johnson 56 41 42 -1 NS
Garfield 39 49 56.6 -7.6 *
Wilson 39 51 56.6 -5.6 *
Hoover 38 55 57.5 -2.5 NS
Cleveland 24 59 69.5 -10.5 **
VanBuren 52 59 45.4 13.6 **
Madison 20 62 72.9 -10.9 **
Grant Wood 47 64 49.7 14.3 ***
Erskine 26 68 67.8 0.2 NS
Truman 12 69 79.8 -10.8 **
Wright  23 68 70.4 -2.4 NS
Hiawatha 26 76 67.8 8.2 *
Nixon 20 79 72.9 6.1 *
Jackson 6 80 85 -5 *
Kenwood 34 80 60.9 19.1 ****
Arthur 17 85 75.5 9.5 **
Coolidge 13 87 78.9 8.1 *
Pierce 2 88 88.4 -0.4 NS
 

Residual:  The difference between the observed and the predicted score.  A negative residual indicates that a school did worse than expected, while a positive residual indicates that a school scored higher than was expected.
Significance: A statistical term indicating whether the residual was statistically significantly different than expected.  A certain amount of leeway is necessary, between which we say the difference is not significantly different than zero.  NS means Not significant.  The number of stars corresponds to the degree of significance, four stars being the most highly significant.  Blue stars mean a school scored higher, and red stars lower, than predicted.

Using the residuals, we can rank the schools according to how they performed (best to worst), with the effect of poverty removed.

    1.  Kenwood
2.  Grant Wood
3.  VanBuren
4.  Arthur
5.  Hiawatha
6.  Coolidge
7.  Nixon
8.  Erskine
9.  Pierce
10.  Johnson
11.  Taylor
12.  Wright
13.  Hoover
14.  Polk
15.  Jackson
16.  Wilson
17.  Garfield
18.  Cleveland
19.  Truman
20.  Madison
21.  Harrison