Probability and Statistics Pre-Test

Front

What is the probability of an event?

Back

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

Front

Define mean in statistics.

Back

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.

Front

What is a variable in statistics?

Back

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

Front

What does it mean if a variable is categorical?

Back

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.

Front

What is the difference between population and sample?

Back

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

Front

What is a survey in statistics?

Back

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.

Front

What is the mode in a data set?

Back

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

Front

Explain the concept of interquartile range (IQR).

Back

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

Front

What is a histogram?

Back

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

Front

Define economic activity.

Back

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