# Ch 25: Data, Statistics & Probability

### About This Chapter

## Data, Statistics & Probability - Chapter Summary

Prepare for the GED exam's mathematical reasoning questions assessing your ability to read and interpret graphical representations of data. Lessons in this chapter can introduce you to the following:

- Tables and schedules
- Pie charts and bar graphs
- Line graphs and scatterplots
- Groups and frequencies on a histogram
- Combinations and permutations
- Mean, median, mode and range
- Independent and dependent event probability

Instructors teaching the data, statistics and probability chapter use real-life examples, graphics and sample problems to explain each concept. In addition to short, entertaining video lessons, content is available in the form of corresponding transcripts that include links to supplementary text lessons. This chapter also provides you with quizzes that can help ensure you understand each concept.

### Data, Statistics & Probability - Chapter Objectives

The GED exam is a 4-part test that includes a 90-minute mathematical reasoning section designed to assess your quantitative problem-solving skills through a series of multiple-choice, fill-in-the-blank, hot spot and matching questions. This chapter can help you prepare for questions that require you to use combinations and permutations to determine the number of event outcomes, calculate probabilities and extrapolate data from a variety of charts and graphs. Results on this and other parts of the exam are used to determine test takers' academic preparedness for a high school equivalency diploma.

### 1. Probability of Independent and Dependent Events

Sometimes probabilities need to be calculated when more than one event occurs. These types of compound events are called independent and dependent events. Through this lesson, we will look at some real-world examples of how to calculate these probabilities.

### 2. How to Calculate Mean, Median, Mode & Range

Measures of central tendency can provide valuable information about a set of data. In this lesson, explore how to calculate the mean, median, mode and range of any given data set.

### 3. Organizing and Understanding Data with Tables & Schedules

In math, when we have to deal with a lot of data, having a visual format to present all the data becomes very useful. Watch this video lesson to learn how you can take advantage of two of these visual formats.

### 4. Understanding Bar Graphs and Pie Charts

In this lesson, we will examine two of the most widely used types of graphs: bar graphs and pie charts. These two graphs can provide the reader with a comparison of the different data that is displayed.

### 5. Reading and Interpreting Line Graphs

Watch this video lesson to find out how useful line graphs can be and how much information you can gain just from looking at one. Learn how you can apply that information in your own life to help you make better decisions.

### 6. Creating & Interpreting Scatterplots: Process & Examples

Scatterplots are a great visual representation of two sets of data. In this lesson, you will learn how to interpret bivariate data to create scatterplots and understand the relationship between the two variables.

### 7. What is a Histogram in Math? - Definition & Examples

Watch this video lesson to see how useful a histogram can be when you need to show a bunch of data in an easy to read format. Also, learn how you can easily gather the information you need from looking at a histogram.

### 8. Using Tables and Graphs in the Real World

We use tables and graphs in algebra as ways to visually show an equation or function. But do we really use these in the real world? Is it that important to learn about tables and graphs? Find out in this video lesson.

### 9. Math Combinations: Formula and Example Problems

Combinations are an arrangement of objects where order does not matter. In this lesson, the coach of the Wildcats basketball team uses combinations to help his team prepare for the upcoming season.

### 10. How to Calculate a Permutation

A permutation is a method used to calculate the total outcomes of a situation where order is important. In this lesson, John will use permutations to help him organize the cards in his poker hand and order a pizza.

### 11. Probability of Compound Events: Definition & Examples

Determining the probability of compound events involves finding the probability of each event and then determining how to combine them. This lesson will give you the tools to find the probability and finish with a quiz to cement your knowledge.

### 12. Test-Retest Reliability Coefficient: Examples & Concept

Test-retest reliability coefficient is a measure of how consistent the results of a test are over time. Learn more about the test-retest reliability coefficient from examples, and test your knowledge with a quiz.

### 13. Variability in Statistics: Definition & Measures

Variability is a measure of the spread of a data set. Learn more about the different measures of variability including the range, variance, and standard deviation, and the way in which they are used in the field of psychology.

### 14. Using the Laws of Inference to Draw Conclusions

In this lesson you will learn about the laws of inference and how to use them to draw conclusions. Also, you will learn how to test the validity of conclusions.

### Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

### Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

### Other Chapters

Other chapters within the College Algebra: Help and Review course

- Basic Arithmetic
- Overview of Real Numbers
- Foundations and Linear Equations: Help and Review
- Overview of Linear Equations
- Matrices and Absolute Value: Help and Review
- Inequalities: Help and Review
- Using FOIL, Graphing Parabolas & Solving Quadratics to Factor: Help & Review
- Properties of Polynomial Functions
- Working with Quadratic Equations
- Complex Numbers: Help and Review
- Exponents and Exponential Expressions
- Overview of Exponents
- Exponents and Polynomials: Help and Review
- Algebraic Expressions and Equations
- Rational Expressions: Help and Review
- Working with Rational Expressions
- Math Expressions and Formulas
- Functions: Help and Review
- Fractions
- Factoring
- Exponentials and Logarithms: Help and Review
- Probability Mechanics: Help and Review
- Calculations, Ratios & Proportions
- Percent Notation
- Sequences and Series: Help and Review
- Basic Number Sense and Operations
- Overview of Roots & Radical Expressions
- Overview of Continuity in Mathematics
- Overview of Mathematical Limits