Data Architecture, Descriptive, Predictive & Prescriptive

What is a data warehouse?

A data warehouse is a centralized repository that stores large volumes of structured data from various sources, optimized for analytics and reporting.

What is a data lake?

A data lake is a storage repository that holds vast amounts of raw, unstructured, or semi-structured data in its native format until it is needed for analysis.

What is a database?

A database is an organized collection of structured information or data, typically stored electronically in a computer system, and can be managed using database management systems (DBMS).

What is an ERD?

An ERD (Entity-Relationship Diagram) is a visual representation of the relationships between entities in a database. It illustrates how data entities are related to one another within a system, typically used in database design.

What is statistics?

Statistics is the branch of mathematics that deals with collecting, analyzing, interpreting, presenting, and organizing data.

What is inferential statistics?

Inferential statistics uses a sample to make predictions about a population.

What is descriptive analysis?

Using descriptive statistics, plus tables and charts, to summarise and present a dataset so it's understandable — answering "what happened" rather than "why" or "what's next."

What is descriptive statistics?

They are the numbers that summarise a dataset. They tell you what the data looks like, not why it's like that or what happens next.

What is Pearson's correlation test?

Pearson's correlation test is a statistical method used to measure the strength and direction of the linear relationship between two continuous variables. Continuous and independent.