Statistics is a branch of math that involves the collection, description, analysis, and inference of conclusions from quantitative data. But what is a statistic? Let’s find out. The word statistic is ...

To calculate the x-bar or sample mean, you would sum all the data points in the sample and then divide by the number of data points. This will be represented by the following formula: However, ...

A z-test is a statistical test used to determine whether two population means are different when the variances are known and the sample size is large.

For example, in totaling responses from completed surveys, you might find that, for the first question, 10 people chose answer "A," 10 people chose "B" and 20 people chose "C." ...

Here are some notable concrete examples.Google once used applied statistics to predict flu outbreaks based on search data; statistician Nate Silver analyzed data to come up with his election forecasts ...

Examples of the Mode For example, in the following list of numbers, 16 is the mode since it appears more times in the set than any other number: 3, 3, 6, 9, 16, 16, 16 , 27, 27, 37, 48 ...

What are the differences between econometrics, statistics, and machine learning? originally appeared on Quora: the place to gain and share knowledge, empowering people to learn from others and ...