Query: A query is a question or request for information. In data science, a query is a request for data that meets certain criteria. For example, you might want to know how many people live in your city or what the average temperature is in December. To answer a query, you need to have the right data and know how to use it.
Definition of Data Collection Data Collection: Data collection is the process of gathering data, often from different sources, for analysis. This can be done through surveys, interviews, focus groups, or other methods. What is a Data Collection used for? A Data Collection is a collection of data that is used for the purpose of analysis…
Definition of Mean Absolute Error Mean Absolute Error (MAE) is a measure of the accuracy of predictions made by a model. It is computed by taking the average of the absolute differences between the predicted values and the actual values for each observation. How is Mean Absolute Error used? Mean Absolute Error (MAE) is a…
A coefficient is a number that measures how much one variable changes when another variable changes.
Definition of XY Scatterplot XY scatterplot: A XY scatterplot is a graphical representation of data in which the data points are plotted on a two-dimensional coordinate system. The data points are usually symbolized by circles, squares, or crosses, and the coordinates of each point are shown as x- and y-values.
Definition of Strata, Stratified Sampling Stratified sampling is a type of probability sampling in which the population is divided into strata and a simple random sample is taken from each stratum. This type of sampling is used when the population is heterogeneous and the researcher wants to ensure that all strata are represented in the…
Definition of Database Administrator Database Administrator: A database administrator (DBA) is a professional who is responsible for the design, creation, installation, monitoring and maintenance of a database. DBAs are also responsible for ensuring that the database is available to users and that data is accurate and secure. What does a Database Administrator do? A Database…