Tech Notes

My notes on Statistics, Big Data, Cloud Computing, Cyber Security

Tag Archives: outcome

Probability

Used for Understanding and Quantifying Randomness.

A probability provides a quantitative description of the likely occurrence of a particular event. Probability is conventionally expressed on a scale from 0 to 1; a rare event has a probability close to 0, a very common event has a probability close to 1.

It is a measure or estimation of likelihood of occurrence of an event

Probability deals with predicting the likelihood of future events, while statistics involves the analysis of the frequency of past events.

Probability is primarily a theoretical branch of mathematics, which studies the consequences of mathematical definitions. Statistics is primarily an applied branch of mathematics, which tries to make sense of observations in the real world.

Read more of this post

Advertisements

Data Collection – Experiments

We are concerned with the analysis of data generated from an experiment. It is wise to take time and effort to organise the experiment properly to ensure that the right type of data, and enough of it, is available to answer the questions of interest as clearly and efficiently as possible. The specific questions that the experiment is intended to answer must be clearly identified before carrying out the experiment. We should also attempt to identify known or expected sources of variability in the experimental units since one of the main aims of a designed experiment is to reduce the effect of these sources of variability on the answers to questions of interest. That is, we design the experiment in order to improve the precision of our answers

Screenshot_112313_091755_AM

Read more of this post

Data Collection – Observational Studies

Observational Studies

In observational studies, as the name implies, the data are measurements of existing characteristics of a group or groups of individuals. The goal is typically to make conclusions about a population based on the sample of individuals we’ve observed, or to compare a measurement on individuals between different groups. Read more of this post