TWIC Survey Sampling

TWIC Site Sampling Model.xls

Transportation Worker Identification Credential

TWIC Survey Sampling

OMB: 1652-0047

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Enrollment Population Enrollment % Month 1 Month 2 Month 3 Month 4 Month 5 Month 6 Month 7 Month 8 Month 9 Month 10 Month 11 Month 12 Total

















STEP 1 -- DOCUMENT PLANNED ENROLLMENT POPULATION















Tier 1















New York/New Jersey 60,896 8.1% 6,766 6,766 6,766 6,766 6,766 6,766 6,766 6,766 6,766


60,894
Long Beach 60,896 8.1% 6,766 6,766 6,766 6,766 6,766 6,766 6,766 6,766 6,766


60,894
Houston, TX 34,832 4.6%
3,870 3,870 3,870 3,870 3,870 3,870 3,870 3,870 3,870

34,830
Philadelphia 27,403 3.7%
3,045 3,045 3,045 3,045 3,045 3,045 3,045 3,045 3,045

27,405
Boston 24,358 3.2%

2,706 2,706 2,706 2,706 2,706 2,706 2,706 2,706 2,706
24,354
Baltimore/Dundalk 24,358 3.2%

2,706 2,706 2,706 2,706 2,706 2,706 2,706 2,706 2,706
24,354
S Louisiana/Morgan City 24,358 3.2%


2,706 2,706 2,706 2,706 2,706 2,706 2,706 2,706 2,706 24,354
New Orleans 24,358 3.2%


2,706 2,706 2,706 2,706 2,706 2,706 2,706 2,706 2,706 24,354
Seattle 24,358 3.2%



3,045 3,045 3,045 3,045 3,045 3,045 3,045 3,045 24,360
Total Tier 1 305,817 40.8% 13,532 20,447 25,859 31,271 34,316 34,316 34,316 34,316 34,316 20,784 13,869 8,457 305,799
Tier 1 Percent of Total

100.0% 70.3% 46.4% 39.1% 35.2% 35.9% 35.6% 40.6% 46.1% 40.0% 31.7% 30.8% 40.8%
Tier 2













-
Norfolk 18,319 2.4%
3,053 3,053 3,053 3,053 3,053 3,053




18,318
Mobile, AL 18,269 2.4%
3,045 3,045 3,045 3,045 3,045 3,045




18,270
Miami, FL 15,224 2.0%
2,537 2,537 2,537 2,537 2,537 2,537




15,222
Port Everglades 15,224 2.0%

2,537 2,537 2,537 2,537 2,537 2,537



15,222
Tampa 15,224 2.0%

2,537 2,537 2,537 2,537 2,537 2,537



15,222
St. Louis 15,224 2.0%

2,537 2,537 2,537 2,537 2,537 2,537



15,222
Portland, OR 15,224 2.0%


2,537 2,537 2,537 2,537 2,537 2,537


15,222
Honolulu 15,224 2.0%


2,537 2,537 2,537 2,537 2,537 2,537


15,222
Savannah, GA 15,013 2.0%


2,502 2,502 2,502 2,502 2,502 2,502


15,012
Total Tier 2 235,066 31.3% - 8,635 16,246 23,822 29,756 34,587 39,175 30,540 22,929 15,353 9,419 4,588 235,050
Tier 2 Percent of Total

0.0% 29.7% 29.2% 29.8% 30.5% 36.2% 40.6% 36.1% 30.8% 29.5% 21.6% 16.7% 31.3%
Tier 3













-
Texas City, TX 7,307 1.0%

2,436 2,436 2,436






7,308
Corpus Christi, TX 6,090 0.8%

2,030 2,030 2,030






6,090
Baton Rouge, LA 6,090 0.8%

2,030 2,030 2,030






6,090
Beaumont, TX 6,090 0.8%

2,030 2,030 2,030






6,090
Detroit 6,090 0.8%

2,030 2,030 2,030






6,090
Cleveland 6,090 0.8%


2,030 2,030 2,030





6,090
Wilmington, DE 5,542 0.7%


1,847 1,847 1,847





5,541
Palm Beach 5,345 0.7%


1,782 1,782 1,782





5,346
Freeport, TX 4,872 0.6%


1,624 1,624 1,624





4,872
Total Tier 3 178,645 23.8% - - 10,556 19,463 27,581 23,524 19,936 16,893 15,023 13,741 18,282 13,653 178,652
Tier 3 Percent of Total

0.0% 0.0% 18.9% 24.3% 28.3% 24.6% 20.7% 20.0% 20.2% 26.4% 41.8% 49.7% 23.8%
Tier 4













-
Pensacola, FL 1,267 0.2%

634 634







1,268
New London, CT 1,218 0.2%

609 609







1,218
Portsmouth, NH 1,218 0.2%

609 609







1,218
Chester, PA 1,218 0.2%

609 609







1,218
New Castle, DE 1,218 0.2%

609 609







1,218
Pennsbury Manor, PA 1,218 0.2%


609 609






1,218
Greenville, MS 1,218 0.2%


609 609






1,218
Gary, IN 1,218 0.2%


609 609






1,218
Anacores, WA 1,218 0.2%


609 609






1,218
Brunswick, GA 864 0.1%



864






864
Total Tier 4 30,480 4.1% - - 3,070 5,506 5,769 3,045 3,045 2,862 2,130 2,130 2,130 794 30,481
Tier 4 Percent of Total

0.0% 0.0% 5.5% 6.9% 5.9% 3.2% 3.2% 3.4% 2.9% 4.1% 4.9% 2.9% 4.1%
GRAND TOTAL ENROLLMENTS 750,008 100.0% 13,532 29,082 55,731 80,062 97,422 95,472 96,472 84,611 74,398 52,008 43,700 27,492 749,982

















STEP 2 -- PLAN SITE VISITS BY MONTH (Overwrite formulas with planned number of visits)















TARGET SITE VISITS

10 22 25 25 25 25 25 25 25 25 25 25 282
Tier 1















New York/New Jersey 60,896 8.1% 5 4 0 1 1 0 0 1 1 13
Long Beach 60,896 8.1% 5 4 0 1 1 1 1 0 1 14
Houston, TX 34,832 4.6% 3 3 1 1 1 1 1 0 1 12
Philadelphia 27,403 3.7% 4 3 1 1 1 1 1 1 1 14
Boston 24,358 3.2% 3 1 1 1 1 1 1 1 0 10
Baltimore/Dundalk 24,358 3.2% 3 1 1 1 1 0 1 1 0 9
S Louisiana/Morgan City 24,358 3.2% 2 1 1 1 1 0 0 1 0 7
New Orleans 24,358 3.2% 2 1 1 1 1 0 0 1 0 7
Seattle 24,358 3.2% 1 1 1 0 1 0 0 1 5
Projected Tier 1 Site Visits 305,817 40.8% 10 15 12 10 9 8 8 6 6 4 2 1 91
Tier 1 Percent of Total

100.0% 70.3% 46.4% 39.1% 35.2% 35.9% 35.6% 40.6% 46.1% 40.0% 31.7% 30.8% 40.8%
Target Tier 1 Site Visits

10 15 12 10 9 9 9 10 12 10 8 8 122
Tier 2













0
Norfolk 18,319 2.4% 3 1 1 1 0 0 6
Mobile, AL 18,269 2.4% 2 2 0 0 0 0 4
Miami, FL 15,224 2.0% 2 1 1 1 0 0 5
Port Everglades 15,224 2.0% 1 1 1 0 0 0 3
Tampa 15,224 2.0% 1 0 1 0 0 0 2
St. Louis 15,224 2.0% 1 1 1 0 0 0 3
Portland, OR 15,224 2.0% 1 1 0 0 0 0 2
Honolulu 15,224 2.0% 1 1 0 0 0 0 2
Savannah, GA 15,013 2.0% 1 1 0 0 0 0 2
Projected Tier 2 Site Visits 235,066 31.3% 0 7 7 7 8 0 0 0 0 0 0 0 29
Tier 2 Percent of Total

0.0% 29.7% 29.2% 29.8% 30.5% 36.2% 40.6% 36.1% 30.8% 29.5% 21.6% 16.7% 31.3%
Target Tier 2 Site Visits

0 7 7 7 8 9 10 9 8 7 5 4 81
Tier 3













0
Texas City, TX 7,307 1.0% 1 0 1 2
Corpus Christi, TX 6,090 0.8% 1 1 1 3
Baton Rouge, LA 6,090 0.8% 1 1 1 3
Beaumont, TX 6,090 0.8% 1 1 1 3
Detroit 6,090 0.8% 1 0 0 1
Cleveland 6,090 0.8% 1 1 0 2
Wilmington, DE 5,542 0.7% 1 1 0 2
Palm Beach 5,345 0.7% 1 1 0 2
Freeport, TX 4,872 0.6% 0 0 0 0
Projected Tier 3 Site Visits 178,645 23.8% 0 0 5 6 7 0 0 0 0 0 0 0 18
Tier 3 Percent of Total

0.0% 0.0% 18.9% 24.3% 28.3% 24.6% 20.7% 20.0% 20.2% 26.4% 41.8% 49.7% 23.8%
Target Tier 3 Site Visits

0 0 5 6 7 6 5 5 5 7 10 12 68
Tier 4













0
Pensacola, FL 1,267 0.2% 0 0 0
New London, CT 1,218 0.2% 0 0 0
Portsmouth, NH 1,218 0.2% 0 1 1
Chester, PA 1,218 0.2% 1 0 1
New Castle, DE 1,218 0.2% 0 0 0
Pennsbury Manor, PA 1,218 0.2% 1 0 1
Greenville, MS 1,218 0.2% 0 0 0
Gary, IN 1,218 0.2% 0 1 1
Anacores, WA 1,218 0.2% 0 0 0
Brunswick, GA 864 0.1% 0 0
Projected Tier 4 Site Visits 30,480 4.1% 0 0 1 2 1 0 0 0 0 0 0 0 4
Tier 4 Percent of Total

0.0% 0.0% 5.5% 6.9% 5.9% 3.2% 3.2% 3.4% 2.9% 4.1% 4.9% 2.9% 4.1%
Target Tier 4 Site Visits

0 0 1 2 1 1 1 1 1 1 1 1 11
Total Projected Site Visits

10 22 25 25 25 25 25 25 26 25 24 25 282

















STEP 3 -- PLAN TOTAL POPULATION SAMPLE BY MONTH
































Total Planned Enrollments by Month

13,532 29,082 55,731 80,062 97,422 95,472 96,472 84,611 74,398 52,008 43,700 27,492 749,982

















Planned Sampling Population:















Total Sample Size Required

315 315 500 500 500 500 500 500 500 500 500 315 5,445
% of Total Population

2.3% 1.1% 0.9% 0.6% 0.5% 0.5% 0.5% 0.6% 0.7% 1.0% 1.1% 1.1% 0.7%


































STEP 4 -- PLAN SITE POPULATION SAMPLE BY MONTH















Tier 1















New York/New Jersey 60,896 8.1% 158 73 0 42 35 0 0 40 45 393
Long Beach 60,896 8.1% 158 73 0 42 35 35 35 0 45 424
Houston, TX 34,832 4.6% 42 35 24 20 20 20 23 0 37 221
Philadelphia 27,403 3.7% 33 27 19 16 16 16 18 20 29 194
Boston 24,358 3.2% 24 17 14 14 14 16 18 26 0 143
Baltimore/Dundalk 24,358 3.2% 24 17 14 14 14 0 18 26 0 127
S Louisiana/Morgan City 24,358 3.2% 17 14 14 14 16 0 0 31 0 106
New Orleans 24,358 3.2% 17 14 14 14 16 0 0 31 0 106
Seattle 24,358 3.2% 16 16 16 0 20 0 0 35 103
Total Tier 1 305,817 40.8% 315 221 111 195 176 144 143 129 168 119 62 35 1,818
Tier 2















Norfolk 18,319 2.4% 33 27 19 16 0 0 95
Mobile, AL 18,269 2.4% 33 27 0 0 0 0 60
Miami, FL 15,224 2.0% 27 23 16 13 0 0 79
Port Everglades 15,224 2.0% 23 16 13 0 0 0 52
Tampa 15,224 2.0% 23 0 13 0 0 0 36
St. Louis 15,224 2.0% 23 16 13 0 0 0 52
Portland, OR 15,224 2.0% 16 13 0 0 0 0 29
Honolulu 15,224 2.0% 16 13 0 0 0 0 29
Savannah, GA 15,013 2.0% 16 13 0 0 0 0 28
Total Tier 2 235,066 31.3% 0 94 146 114 107 0 0 0 0 0 0 0 460
Tier 3













0
Texas City, TX 7,307 1.0% 22 0 13 34
Corpus Christi, TX 6,090 0.8% 18 13 10 41
Baton Rouge, LA 6,090 0.8% 18 13 10 41
Beaumont, TX 6,090 0.8% 18 13 10 41
Detroit 6,090 0.8% 18 0 0 18
Cleveland 6,090 0.8% 13 10 0 23
Wilmington, DE 5,542 0.7% 12 9 0 21
Palm Beach 5,345 0.7% 11 9 0 20
Freeport, TX 4,872 0.6% 0 0 0 0
Total Tier 3 178,645 23.8% 0 0 95 73 73 0 0 0 0 0 0 0 241
Tier 4













0
Pensacola, FL 1,267 0.2% 0 0 0
New London, CT 1,218 0.2% 0 0 0
Portsmouth, NH 1,218 0.2% 0 4 4
Chester, PA 1,218 0.2% 5 0 5
New Castle, DE 1,218 0.2% 0 0 0
Pennsbury Manor, PA 1,218 0.2% 4 0 4
Greenville, MS 1,218 0.2% 0 0 0
Gary, IN 1,218 0.2% 0 3 3
Anacores, WA 1,218 0.2% 0 0 0
Brunswick, GA 864 0.1% 0 0
Total Tier 4 30,480 4.1% 0 0 5 8 3 0 0 0 0 0 0 0 16
GRAND TOTAL 750,008 100.0% 315 315 357 390 359 144 143 129 168 119 62 35 2,535

















STEP 5 -- PLAN SPECIFIC DATE / TIME OF EACH SITE VISIT















File Typeapplication/vnd.ms-excel
AuthorSteven.J.Lowe
Last Modified ByTSA Standard PC User
File Modified2007-10-05
File Created2007-09-21

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