Reading A Data Science Package : Part  would have given you some insights on data science. Now lets look at an interface for R (programming language), R Studios, that will also help you in getting a practical understanding.
What is Data Science?
Data science is an inter-disciplinary field that uses scientific methods, processes, algorithms and systems to extract knowledge and insights from many structural and unstructured data.
Data science is using data to answer questions.
It involves statistics, computer science, mathematics.
Why do we need data…
Time series is a sequence of well-defined data points measured at consistent intervals over a period of time. Data collected on an ad-hoc basis or irregularly does not form a time series. …
What is pairs trading?
A pair’s trade is a trading strategy that involves matching a long position with a short position in two stocks with a high correlation. It is the trading of two stocks as a basket. [Long position -> buying and short position -> selling]
What is co-integration?