What is statistics? The word statistics can mean two different things in statistics. First, take a close look at the figure below.
Find below some examples of statistics according the definition #1
For example, saying that about 3 million students graduate from high school each year in the USA, is an example of statistics.
Second, statistics may refer to the field of study. In this sense, we can define statistics as follows.
Applied statistics involves using formulas, theorems, and laws to solve real-world problems.
Mathematical or theoretical statistics deals with the development of formulas, theorems, and laws. Furthermore, the goal is to prove that these formulas, theorems, and laws are indeed correct.
Decisions made with the use of statistical methods are called educated guesses. On the other hand, when a decision is made without the use of statistical methods, we call this pure guesses. And of course pure guesses are often not reliable.
This unit about statistics will mostly teach you applied statistics. The goal of the lessons is to help you think statistically and be able to make some good educated guesses.
This quiz will help you become familiar with the following words or expressions.