About Pinellas Kids

Accuracy of the Data

The data presented on this website were obtained from a wide range of credible sources including the U.S. Census Bureau, Florida Department of Education, Florida Charts, a product of the Florida Department of Health, and numerous other federal, state and county sources. For the most part, data from sources other than the U.S. Census Bureau are based on actual counts.

Data available from the 2000 decennial Census contain 100% population and housing counts (Summary File 1) and sample data based on a one-in-six sample (Summary File 3). Data contained in the 2001-2008 annual American Community Surveys are based on a very small sample of U.S. Households and contain both sampling error and nonsampling error. According to the Census Bureau:

  • Sampling errors are "errors that occur because only part of the population is directly contacted. With any sample, differences are likely to exist between the characteristics of the sampled population and the larger group from which the sample was chosen. Sampling error, unlike nonsampling error, is measurable."
  • Nonsampling errors are "errors that occur during the measuring or data collection process. Nonsampling errors can yield biased results when most of the errors distort the results in the same direction. Unfortunately, the full extent of nonsampling error is unknown. Decennial censuses traditionally have experienced nonsampling errors, most notable undercount, resulting from people being missed in the enumeration processes."

A detailed description of the sample design and methodology for the 2000 Census and the American Community Survey can be found on the Census Bureau’s websites:

Since the American Community Survey data are based on very small samples, the data may contain significant margins of error. Please take this into consideration when reviewing or using the data presented on this website. Data for three-year estimates will have a smaller margin of error than data for a single year. The sample sizes for Pinellas and selected Florida counties for each survey year are shown in the table below and represent approximately 1.2% of the total housing units in each county.

Year

Pinellas

Duval

Hillsborough

Orange

Palm Beach

2001

1,619

1,224

1,624

1,380

2,139

2002

1,487

1,113

1,476

1,284

1,961

2003

1,840

1,286

1,694

1,443

2,203

2004

1,843

1,234

1,679

1,474

2,228

2005

6,365

4,278

6,184

5,221

8,027

2006

6,343

4,487

6,432

5,411

8,236

2007

6,166

4,475

6,323

5,318

8,067

2008

6,067

4,583

6,262

5,463

8,087

 

Definition of Terms

Margin of Error (MOE)

The margin of error is the difference between an estimate and its upper or lower confidence bounds. Confidence bounds can be created by adding the margin of error to the estimate (for an upper bound) and subtracting the margin of error from the estimate (for a lower bound). All published margins of error for the American Community Survey are based on a 90 percent confidence level.

Confidence Interval

A sample estimate and its standard error permit the construction of a confidence interval that represents the degree of uncertainly about the estimate. A 90 percent confidence interval can be interpreted roughly as providing 90 percent certainty that the true number falls between the upper and lower bounds.

Standard Error

The standard error is a measure of the deviation of a sample estimate from the average of all possible samples.

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