Data Services In Nashville TN At NW Database Services

Data Cleaning, Data Cleansing, Data Scrubbing, Deduplication, Data Transformation, NCOA, Mail PreSorts, Email Verification, Email Append, & Phone Append Services in Nashville Tennessee

Get The Best Database Services In Nashville Tennessee

We provide data services to businesses and organizations in Nashville TN and all Tennessee cities. With over 3 decades of experience in the database business, you won’t find a company that can solve your specific database needs with higher quality service or better prices than Northwest Database Services. No matter what your specific need is, our team will find a data service solution to suit your situation.


More Cities and States Where We Offer Data Cleaning Services

We Are A Full Service Data Services That Can Help You Run Your Business

Northwest Database Services is a full-spectrum data service that has been performing data migration, data scrubbing, data cleaning, and de-duping data services for databases and mailing lists, for over 34 years. NW Database Services provides data services to all businesses, organizations, and agencies in Nashville TN and surrounding communities.

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What We Do

Database Services

When you need your data to speak to you regarding your business’s trends, buying patterns or just whether or not your customers are still living.

Data Transformation

We provide data transformation services for Extract, Transform and Load (ETL) operations typically used in data migration or restoration projects.

De-duplication Service

Duplication of data plagues every database and mailing list. Duplication is inevitable, constantly keeps growing and erodes the quality of your data.

Direct Mail - Presorts

It’s true the United States Postal Service throws away approximately thirty five percent of all bulk mail every year! Why so much? Think: “Mailing list cleanup.

Email-Phone Append

With access to more than 500 million email addresses, Northwest Database Services uses one of the most comprehensive and unique data sets in the industry.


Over 40 million Americans change their address annually, which makes us do the work to maintain a high-quality mailing list while you focus on your business.

We Are Here To Help!

12 + 14 =


Woodland, WA 98674


gch [@]
To use email, remove the brackets


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(360) 841-8168

Information About Data Cleaning And Data Services

What is Hypothesis Testing?

Hypothesis testing involves confirming that your samples support your hypothesis. This is done in order to eliminate any possibility of an accidental result. The clinical trials for the covid-19 vaccine are an example of this. To ensure that the vaccine can be tested on a large number of people, we conduct many trials using a limited number of random samples.

The hypothesis test could ask the following question: “Does covid-19 cause severe illness?” We can determine whether the vaccine works by comparing data from different populations. If the results of all samples are similar and the data is both representative and random, we can conclude that the vaccine will have the same effect on everyone. It is also important to investigate why certain samples are more effective than other. There are two possibilities: the vaccine was administered to different groups or the sampling process was flawed. One of the Covid vaccines was more effective than the others in the trial due to dosing errors. This is a good example of the importance hypothesis testing. If the outlier group were just discarded, the vaccine would be much less effective.

What is a Confidence Period?

Confidence intervals, which are based on samples, can be used for estimating parameters that are relevant to measuring a population (such as the mean). The confidence interval is not a single value, but rather a range. It is often expressed in percentages. A confidence interval is used to verify that the conclusions drawn from a sample are correct.

Let’s say you have 40 randomly selected cats and their tails were measured. The average length of tails measured is 17.5 cm. The average deviation in tail length is 2 cm. A special formula can be used to calculate the average lengths of tails for all cats. This results in a 95% confidence interval. This means that 95%, which is impossible to know without measuring all of population, falls within this range. This is a great way to test the accuracy of sampling methods.

What is Regression and Correlation Analysis?

Regression and correlation analysis are both options to determine the relationships between two or more variables.

Regression analysis analyzes how one dependent variable (or output), is affected by one or several independent variables (or inputs). This can be used to test hypotheses or for predictive analytics. You could use this data to predict future sunscreen sales (an input variable) by comparing sales from the previous year with weather data (which may be both input variables), in order determine how sunny days have affected sales.

Correlation analysis is a method of determining the degree to which two or more datasets are related. Contrary to regression analysis, correlation analysis doesn’t infer cause-and effect.

Northwest Database Services has 34+ years experience with all types of data services, including mail presorts, NCOA, and data deduplication. If your database systems are not returning poor data, it is definitely time for you to consult with a data services specialist. We have experience with large and small data sets. Often, data requires extensive manipulation to remove corrupt data and restore the database to proper functionality. Call us at (360)841-8168 for a consultation and get the process of data cleaning started as soon as possible.

NW Database Services
404 Insel Rd
Woodland WA 98674

City of Nashville TN Information

Nashville Tennessee

Nashville is the capital of Tennessee, and the seat for Davidson County. Nashville, with a population of 689 447, was the 21st-most-populous U.S. city and fourth in the southeastern U.S. at the 2020 U.S. Census. It is also the largest city in Tennessee.


The city was named after Francis Nash who was a General of the Continental Army during American Revolutionary War. It was established in 1779. Its strategic location on the Cumberland River, as well as its role in railroad development, helped the city grow quickly. Nashville seceded from Tennessee during the American Civil War. It was the first Confederacy state capital to be captured by Union forces in 1862. The city was able to regain its position and built a manufacturing base.


Although snowfall is common during winter, it is not usually heavy. The average annual snowfall is approximately 4.7 inches (12cm), with the majority of it falling in January and February, but occasionally also in March, November, and December. On January 22, 2016, Nashville saw 8 inches (20cm) of snow. The biggest snowfall since 2003 was recorded on March 17, 1892 during the St. Patrick’s Day Snowstorm.


The city had 689,447 residents, 279,545 households and 146,241 families as of the 2020 United States Census. The largest increase in population was 88,225 (or 14.67%) over the 2010 population of 601,222. The population density was 1,367.87 people per square mile (528.14/km2).


The 2016 American Community Survey found that 78.1% commuted to work by car alone, 9.8% used carpooling, 2.2% used public transport, and 2.2% walked. Around 1.1% used other transportation options, such as a taxicab, bike, or motorcycle. Around 6.7% of Nashville residents work at home. In 2015, 7.9% Nashville households had no car. This number dropped to 5.9% in 2016. In 2016, the national average was 8.7 per cent. Nashville had an average of 1.72 cars per household in 2016 compared with a national average average of 1.8.

Top Businesses

Numerous publications called Nashville a “southern Boomtown” in the second decade of the 21st Century. In 2017, it had the third-fastest-growing metropolitan economy in the United States and “adds an average of 100 people a day to its net population increase”.


Nashville TN Map