Probability and Statistics Pre-Test

The probability of an event is a measure of the likelihood that the event will occur, expressed as a number between 0 and 1.

The mean is the average of a set of numbers, calculated by adding all the data points together and dividing by the number of points.

A variable is a characteristic or attribute that can take on different values among individuals in a population.

A categorical variable is one that can take on one of a limited, fixed number of possible values, assigning each individual or other unit of observation to a particular group.

A population includes all members of a specified group, while a sample is a subset of the population used to represent the group.

A survey is a method of collecting data by asking questions to a group of people to gather information about their opinions, behaviors, or characteristics.

The mode is the value that appears most frequently in a data set.

The interquartile range (IQR) is a measure of statistical dispersion, calculated as the difference between the third quartile (Q3) and the first quartile (Q1).

A histogram is a graphical representation of the distribution of numerical data, showing the frequency of data points within specified ranges (bins).

Economic activity refers to actions that involve the production, distribution, and consumption of goods and services.