Data Glossary Lab

NoSQL stands for "not only SQL". A database management system used for storage and retrieval of non-relational (i.e., non-tabular) databases.

Null hypothesis is a type of hypothesis that states the opposite of the alternative hypothesis to be checked, i.e., that no significant statistical relationship exists between the two variables and that the observations are all based on chance.

Normalization is the process of rescaling the data so that all the attributes have the same scale. Normalization is necessary for making a meaningful comparison between the attributes and also is required for some machine learning algorithms.

Natural Language Processing (NLP) is a branch of computer science and artificial intelligence that deals with making computer applications understand and analyze written or spoken human language. NLP techniques take input text data, which is usually unstructured, and convert it into a structured form. The techniques then look for linguistic and contextual patterns, categorize them, and extract valuable insights from this data. NLP also involves leveraging machine learning and deep learning to generate language, categorize it, and complete other cognitive tasks using language. Some common applications of NLP include chatbots, speech-to-text converters, sentiment analysis, and automatic translation.

A neural network is artificial intelligence's attempt to reverse-engineer the human brain.