Code Academy Data Science

Supervised Learning

Category of data-mining techniques in which an algorithm learns how to predict or classify an outcome variable of interest.

CSV file

Comma separated values file; a text file with one record per line, and the field of each record separated by commas

Machine Learning

Machine Learning is the science of getting computers to learn and act like humans do, and improve their learning over time in autonomous fashion, by feeding them data and information in the form of observations and real-world interactions

Database

Set of data stored in a computer structured into tables. May have rows and columns.

SQL

Structured Query Language. handles HOW you get the data.

Python

a general-purpose programming language

Matplotlib

a python module

Retention Rate Formula

whole minus part

Queries

defines subset of data you are looking for

pandas

lets us analyze spreadsheet data

Churn Rate Formula

part divided by whole

Unsupervised Learning

the data is unlabeled and the program learns to recognize the inherent structure of the input data.

retention rate

the fraction of a firm's current earnings that the firm retains

churn rate

the rate at which customers leave a product or service