GED® Data Analysis & Probability
A comprehensive course on data analysis and probability for the GED®. Students learn to read and interpret tables, bar graphs, line graphs, and pie charts; calculate measures of center (mean, median, mode) and spread (range, standard deviation); understand probability of single and compound events; and apply statistical reasoning to real-world problems. Includes many worked examples and practice questions.
📚 Course Curriculum
Data visualization displays information in a format that is quick to understand. The GED® tests your ability to extract information from common displays. Tables:. A …
🔒 Enroll to unlock this session.
Pie charts divide a whole into slices, where each slice represents a part of the total. The whole circle always represents 100%. [[figure:pie_chart_budget Family budget …
🔒 Enroll to unlock this session.
Scatter plots display the relationship between two numerical variables. Each point represents one pair of values (x, y). Reading a scatter plot:. The x-axis usually …
Open trial session →A frequency table lists categories or numerical intervals alongside how many data values fall into each one. Example:. A histogram is a bar graph built …
🔒 Enroll to unlock this session.
Stem-and-leaf plots organize numerical data by splitting each value into a "stem" (all digits except the last) and a "leaf" (the last digit), preserving every …
🔒 Enroll to unlock this session.
This session consolidates Sessions 1–5. Instead of introducing a new display, we practice choosing the right reading strategy for whichever chart, table, graph, or plot …
🔒 Enroll to unlock this session.
These four measures describe a dataset in different ways. Mean (Average):. The mean is the sum of all values divided by the number of values. …
🔒 Enroll to unlock this session.
A weighted average gives different values different levels of importance instead of treating them equally, unlike a simple mean. Example: a course grade is 20% …
🔒 Enroll to unlock this session.
Quartiles divide an ordered data set into four equal parts. Q1 (first quartile): the median of the lower half of the data. Q2: the median …
🔒 Enroll to unlock this session.
While the range and IQR describe spread using only a few values, variance and standard deviation use every data point to measure how far, on …
🔒 Enroll to unlock this session.
Not every measure of center tells the same story. Choosing the right one depends on the shape of the data. Effect of outliers:. The mean …
🔒 Enroll to unlock this session.
This session reviews Sessions 7–11 (mean, median, mode, range, weighted averages, quartiles, IQR, and standard deviation) through mixed, GED®-style practice problems. Focus areas:. 1. Calculating …
Open trial session →Probability measures the likelihood of an event occurring, from 0 (impossible) to 1 (certain). Basic Example:. A standard die has six faces numbered 1 to …
🔒 Enroll to unlock this session.
Complementary events are two outcomes where exactly one must occur; together they account for all possibilities. Example: if the probability of rain tomorrow is 0.3, …
🔒 Enroll to unlock this session.
Compound events involve multiple outcomes. AND Events (Intersection):. Both events must happen. Use multiplication. (Assuming events are independent—one doesn't affect the other.). Example: Probability of …
🔒 Enroll to unlock this session.
Two events are independent if the outcome of one does not affect the probability of the other. Two events are dependent if the outcome of …
🔒 Enroll to unlock this session.
The fundamental counting principle states that if one event can occur in \(m\) ways and a second, independent event can occur in \(n\) ways, the …
🔒 Enroll to unlock this session.
This session reviews Sessions 13–17 (single-event probability, complements, compound AND/OR events, independent versus dependent events, and the counting principle) through mixed, GED®-style problems. Focus areas:. …
🔒 Enroll to unlock this session.
A distribution describes how data is spread across a range. Normal Distribution (Bell Curve):. Many real-world datasets follow a bell-shaped curve: most values cluster near …
🔒 Enroll to unlock this session.
Correlation describes a statistical association between two variables: as one changes, the other tends to change too. Causation means that a change in one variable …
🔒 Enroll to unlock this session.
A population is the entire group a study wants to learn about. A sample is a smaller subset of the population actually measured, used to …
Open trial session →Master these strategies for the GED® data and probability questions. Strategy 1 - Always read the graph carefully. Spend 15 seconds identifying:. Title: What is …
🔒 Enroll to unlock this session.
Course Syllabus
This self-paced GED® Math course follows a 7-lesson sequence. Work through the modules in order so that each skill supports the next.
Course sequence
Module 1 - Lessons 1-4
- Reading Data: Tables, Bar Graphs, and Line Graphs
- Pie Charts and Percentages
- Mean, Median, Mode, and Range
- Probability Basics: Single Events
Module 2 - Lessons 5-7
- Compound Probability: AND and OR
- Distributions and Outliers
- Data Analysis: Test-Taking Strategies
Practice and completion
- Use worked examples and lesson practice to check understanding after each module.
- Review incorrect answers, explain the correction, and repeat weak skills.
- Complete the available mixed or final course practice to demonstrate readiness.
Course Outcomes
By the end of this course, learners will be able to:
- Explain and apply the mathematical ideas in Reading Data: Tables, Bar Graphs, and Line Graphs.
- Solve multi-step problems involving Mean, Median, Mode, and Range and show a clear method.
- Interpret representations and check the reasonableness of work involving Probability Basics: Single Events.
- Choose efficient strategies for unfamiliar questions related to Compound Probability: AND and OR.
- Combine skills from Data Analysis: Test-Taking Strategies with earlier topics in mixed practice.
- Use feedback and answer explanations to diagnose and correct mistakes.
- Complete mixed, exam-style practice with clearer reasoning and greater independence.
📝 Practice Questions
248 interactive questions with instant feedback and explanations.
Enroll for free to unlock the full practice bank after the trial sessions.