Data Services In Lexington‑Fayette KY At NW Database Services

Data Cleaning, Data Cleansing, Data Scrubbing, Deduplication, Data Transformation, NCOA, Mail PreSorts, Email Verification, Email Append, & Phone Append Services in Lexington‑Fayette Kentucky

Get The Best Database Services In Lexington‑Fayette Kentucky

We provide data services to businesses and organizations in Frankfort KY and all Kentucky 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 Lexington‑Fayette KY 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!

11 + 14 =


Sandersville, GA 31082


gch [@]
To use email, remove the brackets


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Information About Data Cleaning And Data Services

To Identify Outliers, Use the Z-Score

Wikipedia defines Z-score (also known as standard score) as “number standard deviations” which determines whether the raw value (i.e. Wikipedia defines Z-score as the “number of standard deviations” that determine whether a raw (i.e., datapoint) has a value higher or lower than its mean value. This places it in relation to the standard deviation, or mean, of all data points. Negative standard scores are lower than the mean. Raw scores with positive standard scores are scores that are higher than the mean. Normal distributions are formed by the standard deviation of 1 and the mean of 0.
You can find outliers by using z-score calculations if you examine data points that are too far from 0 (mean). In many cases, the “too far” threshold will be +3 to+3, and anything higher than that will be considered outliers.
Z-scores are often used in stock market data. Z-scores can be easily calculated using Excel, R, or the Quick Z Score Calculator.

To Identify Outliers, the Isolation Forest Algorithm Can Be Used

The Isolation Forest (also known as iForest) is another algorithm for anomaly detection. The algorithm was created to distinguish outliers from normal data points in a dataset. It uses two quantitative characteristics: they are rarer than normal and have different attribute-values.
These outliers are visible by the Isolation forest, which will generate “Isolation trees” from the data. Outliers are points that have shorter paths than their branches.
Machine learning is incomplete without isolation forest. SourceForge has the implementation of this algorithm.

Which Is the Best Time to Remove Outliers?

It may seem natural to try to eliminate outliers in data cleaning. However, this is not always the best approach. It is often better to keep outliers from your data.
Outliers that are found in extremes of your data can lead to inconsistencies which could be detrimental to your data analysis goals. These inconsistencies could lead to statistical significance being reduced in an analyze.

A Quick Introduction to Hypothesis Testing (P–value).

The purpose of the analysis is to draw conclusions. You will need to gather data from just 1000 people if you want to understand the New York City residents’ eating habits. When you analyze these data, you want to determine if your findings can be applied in a larger population. This is done by determining your statistical significance.
This is part of hypothesis testing.

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 Lexington‑Fayette KY Information

Lexington‑Fayette KY

Lexington, Kentucky is the county seat for Fayette County. It is the second-largest municipality in Kentucky, and the 57th largest in the United States. It is the 28th largest city in terms of land area. It is also known by the title “Horse Capital of the World”. It’s located in the Bluegrass region of Kentucky. It is home to the Kentucky Horse Park and The Red Mile and Keeneland races courses, Rupp Arena and Central Bank Center, Transyvania University, The University of Kentucky and Bluegrass Community and Technical College.


Lexington was established in Virginia’s Fincastle County in June 1775. This was 17 years before Kentucky was made a state. William McConnell led a party of frontiersmen who camped at the Middle Fork Elkhorn Creek, now known as Town Branch, and then rerouted under Vine Street to the location of McConnell Springs. The colonists won the Battles of Lexington & Concord on April 19, 1775. They named the area Lexington. It was the first American place to be named after the Massachusetts city.


Lexington lies in the northern part of the humid subtropical climate zones (Cfa). It experiences hot, humid summers and moderately cool winters with some mild periods. It is also in USDA hardiness zone 6b. The four seasons in Lexington and the Bluegrass region include cool plateau breezes and moderate nights in summer. There are no long periods of heat, cold or rain. The average monthly temperature is 33.9 degrees F (1.1 degree Celsius) in January and 76.7 degrees F (24.8 degC in July), while the annual average temperature is 56.3 degrees Fahrenheit (13.5 degC). There are 25 days with 90 degree F (32 degrees C)+ highs annually, and 23 days where the high is less than or equal to freezing. The average annual precipitation is 49.84 in (1,270 mm), with late spring and summer being slightly more wet. Snowfall averages 14.5 in (37 cm) per year. Extreme temperatures can range from -21 degrees F (-29 degC), January 24, 1963, up to 108 degrees (42 degC), July 10, and 15, 1936.


Lexington is plagued by traffic congestion, despite being a small city. This is due to a lack of freeways, proximity of the University of Kentucky downtown and large number of commuters coming from nearby towns. Citation Boulevard will provide traffic relief for northern New Circle Road.

Top Businesses

Lexington is home to one of the most stable economies in the country. Lexington is proud of its “fortified economy” which includes strong manufacturing, technology and entrepreneurial support. It also benefits from a diverse business base. In August 2015, the Lexington Metro Area had a 3.7% unemployment rate. This is lower than other cities of comparable size.


Lexington‑Fayette KY Map