Statistics

Statistics is the math of collecting, organizing, and making sense of data. Whether you’re reading a patient’s vital signs chart, interpreting quality control reports on a job site, or understanding test score distributions, statistics gives you the tools to draw meaningful conclusions from numbers.

Why Statistics Matters

Statistics shows up in every profession:

• Nurses read patient vital signs charts and interpret lab result ranges
• Electricians analyze power consumption data and load averages
• Construction managers track project timelines using data and probability
• Business owners interpret sales reports, customer data, and financial summaries
• Test takers need statistics for GED, SAT, nursing certifications, and college entrance exams

Each topic in this section includes practical examples from these fields.

Where to Start

If you’re brand new to statistics, begin with What Is Statistics? — it introduces the key vocabulary and concepts you’ll use everywhere else. From there, the clusters progress naturally: data displays, central tendency, spread, and then into probability and inference. For the GED, focus on Data Literacy, Data Displays, and Central Tendency. For the SAT, add Probability and Study Design.