Statistics

What is Statistics?

The discipline that concerns the collection, organization, analysis, interpretation, and presentation of data.

The three main components of statistics include:

Design → Description → Inference

Design - Stating the goal and/or statistical question of interest and planning how to obtain data

Description - Summarizing and analyzing the data obtained

Inference - Making decisions and predictions based on the data for answering the statistical question

Design is the most important step

Population: The collection of all items/individuals to our study (Which includes subjects)

What is an example of a population? - All the people on earth, All the apple trees in the world

Census - A survey conducted on the full set of individuals belonging to a given population

Why is a census from a population not the best? - Its time consuming, expensive and most of the time impractical.

Sample - A subject of the population for whom we plan to have data

Ex. Sample: 150 apple trees from an apple orchard in Michigan

What are some examples of convenient samples?

What does SRS stand for? - Sample Random Sampling