# Bilingual Form Stratification Plan

## Additional Information

Michael Bentley, Joan Hill, Kellye Allmang, Henry Woltman

Decennial Statistical Studies Division, Census Experiments Branch

U.S. Census Bureau

March 28, 2007

# How to read the tables

(example using part of table 2 on page 3)

+------+-------+----------+------+----+------+-------+--------+---+
| *    | **    | **\#     | **%  | *  | **%  | **%   | **% of | * |
| *Str | Total | "Spanish | SA   | *% | of   | of    | all    | * |
| atum | HUs   | ass      | HUs  | of | all  | all   | Span   | \ |
| defi | (in   | istance" | in   | a  | "    | His   | ish-Sp | # |
| niti | m     | HUs in   | s    | ll | most | panic | eaking | S |
| on** | illio | s        | trat | SA | in   | Peo   | HUs**  | t |
|      | ns)** | tratum** | um** | H  | nee  | ple** |        | a |
| **(  |       |          |      | Us | d"** |       | *      | t |
| 1)** | **    | **(N =   | **(  | ** |      | **    | *(8)** | e |
|      | (2)** | 5.3M)**  | 4)** |    | **(  | (7)** |        | s |
|      |       |          |      | *  | 6)** |       |        | * |
|      |       | **(3)**  |      | *( |      |       |        | * |
|      |       |          |      | 5) |      |       |        |   |
|      |       |          |      | ** |      |       |        | * |
|      |       |          |      |    |      |       |        | * |
|      |       |          |      |    |      |       |        | ( |
|      |       |          |      |    |      |       |        | 9 |
|      |       |          |      |    |      |       |        | ) |
|      |       |          |      |    |      |       |        | * |
|      |       |          |      |    |      |       |        | * |
+------+-------+----------+------+----+------+-------+--------+---+
| 20%  | 7.9   | 2.9      | 39.1 | 54 | 63.9 | 50.7  | 42.9   | 3 |
|      |       |          |      | .2 |      |       |        | 8 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 84.6  | 2.4      | 3.1  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+

-   **(1)** The stratum definition of 20% means that these
    mailout/mailback housing units are in tracts where at least 20
    percent of the tract (in Census 2000) consisted of households
    meeting the defined criteria (of at least one Spanish-speaking
    person 15 years or older who does not speak English "very well").
    The "other" row consists of housing units in all other tracts not
    meeting the 20 percent or higher threshold.

-   In the 20% or higher stratum, **(2)** there were 7.9 million housing
    units in Census 2000.

-   **(3)** In total there were 5.3 million "Spanish assistance" housing
    units meeting the defined criteria. Of these, 2.9 million were in
    the 20% or higher stratum (**(5)** thus 54.2 "% of all SA HUs" are
    in this stratum).

-   **(4)** 39.1 percent of the households (2.9 out of 7.9 million) in
    the 20% or higher stratum met the defined criteria.

-   **(6)** The 20% or higher stratum contains 63.9 percent of all
    households that met the definition of those "most in need" of a
    bilingual English/Spanish form. **(7)** It also contains 50.7
    percent of all people (15 years or older) that were identified as
    Hispanic or Latino, **(8)** and 42.9 percent of all households with
    at least one Spanish-speaking person (of any English ability) 15 or
    older.

-   **(9)** The housing units in the 20% or higher stratum have a
    geographic spread covering 38 different states.

Table 1. Comparison of Data Under Different Stratum Definitions for
"Spanish Assistance" Criteria of One Spanish-Speaking Person 15+ in
household who speaks English "Not Well" or "Not at All".

+------+-------+----------+------+----+------+-------+--------+---+
| *    | **    | **\#     | **%  | *  | **%  | **%   | **% of | * |
| *Str | Total | "Spanish | SA   | *% | of   | of    | all    | * |
| atum | HUs   | ass      | HUs  | of | all  | all   | Span   | \ |
| defi | (in   | istance" | in   | a  | "    | His   | ish-Sp | # |
| niti | m     | HUs in   | s    | ll | most | panic | eaking | S |
| on** | illio | s        | trat | SA | in   | Peo   | HUs**  | t |
|      | ns)** | tratum** | um** | H  | n    | ple** |        | a |
|      |       |          |      | Us | eed" |       |        | t |
|      |       | **(N =   |      | ** | \*** |       |        | e |
|      |       | 3.5M)**  |      |    |      |       |        | s |
|      |       |          |      |    |      |       |        | * |
|      |       |          |      |    |      |       |        | * |
+------+-------+----------+------+----+------+-------+--------+---+
| 35%  | 2.0   | 0.9      | 48.8 | 26 | 30.2 | 19.2  | 15.6   | 2 |
|      |       |          |      | .6 |      |       |        | 4 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 90.5  | 2.6      | 3.1  |    | [    | []{.  | []{    | [ |
| ther |       |          |      |    | ]{.m | mark} | .mark} | ] |
|      |       |          |      |    | ark} |       |        | { |
|      |       |          |      |    |      |       |        | . |
|      |       |          |      |    |      |       |        | m |
|      |       |          |      |    |      |       |        | a |
|      |       |          |      |    |      |       |        | r |
|      |       |          |      |    |      |       |        | k |
|      |       |          |      |    |      |       |        | } |
+------+-------+----------+------+----+------+-------+--------+---+
| 30%  | 2.8   | 1.2      | 44.4 | 33 | 37.1 | 24.6  | 20.1   | 2 |
|      |       |          |      | .0 |      |       |        | 6 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 89.7  | 2.3      | 2.8  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 25%  | 3.7   | 1.4      | 40.0 | 40 | 44.5 | 30.7  | 25.3   | 3 |
|      |       |          |      | .0 |      |       |        | 1 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 88.8  | 2.1      | 2.5  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 20%  | 5.1   | 1.7      | 35.2 | 48 | 53.0 | 38.4  | 31.7   | 3 |
|      |       |          |      | .3 |      |       |        | 7 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 87.4  | 1.8      | 2.2  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 15%  | 6.9   | 2.0      | 30.5 | 56 | 61.5 | 46.5  | 38.9   | 3 |
|      |       |          |      | .8 |      |       |        | 9 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 85.5  | 1.5      | 1.9  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 12%  | 8.6   | 2.2      | 27.2 | 62 | 67.5 | 52.4  | 44.1   | 4 |
|      |       |          |      | .8 |      |       |        | 0 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 83.9  | 1.3      | 1.7  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 10%  | 10.1  | 2.3      | 24.9 | 67 | 71.7 | 56.7  | 48.0   | 4 |
|      |       |          |      | .0 |      |       |        | 1 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 82.4  | 1.2      | 1.5  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 9%   | 11.0  | 2.4      | 23.6 | 69 | 74.0 | 59.1  | 50.2   | 4 |
| \*\* |       |          |      | .3 |      |       |        | 1 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 81.5  | 1.1      | 1.4  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+

Source: Census 2000 long form data, Sample Census Edited File (SCEF)

Mailout/mailback TEAs (1,6) only.

\* This is defined as: *All* people 15+ in household speak Spanish and
speak English "not well" or "not at all."

Table 2. Comparison of Data Under Different Stratum Definitions for
"Spanish Assistance" Criteria of One Spanish-Speaking Person 15+ in
household who speaks English "Well," "Not Well" or "Not at All" (i.e,
does not speak English "Very Well").

+------+-------+----------+------+----+------+-------+--------+---+
| *    | **    | **\#     | **%  | *  | **%  | **%   | **% of | * |
| *Str | Total | "Spanish | SA   | *% | of   | of    | all    | * |
| atum | HUs   | ass      | HUs  | of | all  | all   | Span   | \ |
| defi | (in   | istance" | in   | a  | "    | His   | ish-Sp | # |
| niti | m     | HUs in   | s    | ll | most | panic | eaking | S |
| on** | illio | s        | trat | SA | in   | Peo   | HUs**  | t |
|      | ns)** | tratum** | um** | H  | n    | ple** |        | a |
|      |       |          |      | Us | eed" |       |        | t |
|      |       | **(N =   |      | ** | \*** |       |        | e |
|      |       | 5.3M)**  |      |    |      |       |        | s |
|      |       |          |      |    |      |       |        | * |
|      |       |          |      |    |      |       |        | * |
+------+-------+----------+------+----+------+-------+--------+---+
| 50%  | 1.8   | 1.1      | 64.4 | 20 | 27.0 | 17.4  | 14.5   | 1 |
|      |       |          |      | .3 |      |       |        | 9 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 90.7  | 4.2      | 5.0  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 45%  | 2.3   | 1.3      | 60.3 | 25 | 32.6 | 21.9  | 18.3   | 2 |
|      |       |          |      | .1 |      |       |        | 2 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 90.1  | 4.0      | 4.8  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 40%  | 3.0   | 1.6      | 56.5 | 29 | 37.9 | 26.5  | 22.1   | 2 |
|      |       |          |      | .8 |      |       |        | 4 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 89.5  | 3.7      | 4.5  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 35%  | 3.8   | 1.9      | 52.4 | 35 | 43.9 | 31.8  | 26.5   | 3 |
|      |       |          |      | .3 |      |       |        | 0 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 88.7  | 3.4      | 4.2  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 30%  | 4.9   | 2.2      | 48.1 | 41 | 50.5 | 37.7  | 31.6   | 3 |
|      |       |          |      | .3 |      |       |        | 3 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 87.6  | 3.1      | 3.8  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 25%  | 6.2   | 2.5      | 43.8 | 47 | 56.0 | 43.9  | 36.9   | 3 |
|      |       |          |      | .5 |      |       |        | 5 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 86.3  | 2.8      | 3.5  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 20%  | 7.9   | 2.9      | 39.1 | 54 | 63.9 | 50.7  | 42.9   | 3 |
|      |       |          |      | .2 |      |       |        | 8 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 84.6  | 2.4      | 3.1  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 15%  | 10.3  | 3.3      | 34.1 | 61 | 71.1 | 58.3  | 49.7   | 4 |
|      |       |          |      | .5 |      |       |        | 1 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 82.2  | 2.1      | 2.7  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 12%  | 12.4  | 3.5      | 30.5 | 66 | 75.9 | 63.5  | 54.5   | 4 |
|      |       |          |      | .5 |      |       |        | 1 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 80.1  | 1.8      | 2.4  |    | [    | []{.  |        |   |
| ther |       |          |      |    | ]{.m | mark} |        |   |
|      |       |          |      |    | ark} |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+

Source: Census 2000 long form data, Sample Census Edited File (SCEF)

Mailout/mailback TEAs (1,6) only.

\* This is defined as: *All* people 15+ in household speak Spanish and
speak English "not well" or "not at all."

Table 3. Comparison of Data Under Different Stratum Definitions for
"Spanish Assistance" Criteria of All People 15+ in household speak
Spanish and speak English "Well," "Not Well" or "Not at All" (i.e, none
speak English "Very Well").

+------+-------+----------+------+----+------+-------+--------+---+
| *    | **    | \#       | **%  | *  | **%  | **%   | **% of | * |
| *Str | Total | "Spanish | SA   | *% | of   | of    | all    | * |
| atum | HUs   | ass      | HUs  | of | all  | all   | Span   | \ |
| defi | (in   | istance" | in   | a  | "    | His   | ish-Sp | # |
| niti | m     | HUs in   | s    | ll | most | panic | eaking | S |
| on** | illio | stratum  | trat | SA | in   | Peo   | HUs**  | t |
|      | ns)** |          | um** | H  | n    | ple** |        | a |
|      |       | **(N =   |      | Us | eed" |       |        | t |
|      |       | 2.4M)**  |      | ** | \*** |       |        | e |
|      |       |          |      |    |      |       |        | s |
|      |       |          |      |    |      |       |        | * |
|      |       |          |      |    |      |       |        | * |
+------+-------+----------+------+----+------+-------+--------+---+
| 35%  | 0.7   | 0.3      | 43.9 | 11 | 14.9 | 6.5   | 5.8    | 1 |
|      |       |          |      | .7 |      |       |        | 5 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 91.8  | 2.1      | 2.5  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 30%  | 1.1   | 0.4      | 39.2 | 17 | 21.2 | 10.6  | 9.2    | 2 |
|      |       |          |      | .3 |      |       |        | 0 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 91.3  | 2.0      | 2.3  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 25%  | 1.8   | 0.6      | 34.8 | 24 | 29.2 | 16.0  | 13.8   | 2 |
|      |       |          |      | .5 |      |       |        | 5 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 90.7  | 1.8      | 2.2  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 20%  | 3.0   | 0.8      | 29.9 | 34 | 40.0 | 24.4  | 20.8   | 3 |
|      |       |          |      | .7 |      |       |        | 0 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 89.5  | 1.6      | 1.9  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 15%  | 4.6   | 1.1      | 25.4 | 45 | 51.4 | 34.2  | 29.0   | 3 |
|      |       |          |      | .8 |      |       |        | 7 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 87.8  | 1.3      | 1.6  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 12%  | 6.1   | 1.3      | 22.6 | 53 | 58.8 | 41.3  | 35.1   | 3 |
|      |       |          |      | .4 |      |       |        | 9 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 86.4  | 1.1      | 1.4  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 10%  | 7.4   | 1.4      | 20.5 | 58 | 64.0 | 46.8  | 39.8   | 4 |
|      |       |          |      | .8 |      |       |        | 0 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 85.1  | 1.0      | 1.3  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+
| 8%   | 9.1   | 1.6      | 18.3 | 65 | 69.9 | 52.8  | 45.1   | 4 |
|      |       |          |      | .0 |      |       |        | 1 |
+------+-------+----------+------+----+------+-------+--------+---+
| O    | 83.3  | 0.9      | 1.1  |    |      |       |        |   |
| ther |       |          |      |    |      |       |        |   |
+------+-------+----------+------+----+------+-------+--------+---+

Source: Census 2000 long form data, Sample Census Edited File (SCEF)

Mailout/mailback TEAs (1,6) only.

\* This is defined as: *All* people 15+ in household speak Spanish and
speak English "not well" or "not at all."