Statistics and probability
ASP written lesson, 9 min read. ASP Domain 1: Mathematical Calculations
AI-drafted from the cited rules and fact-checked against them. Study aid, not site-specific safety advice. The official rule controls.
What you'll learn
- Compute the mean and median of a small data set
- Calculate a sample standard deviation step by step
- Explain why outliers distort the mean but not the median
- Calculate AND and OR gate probabilities for independent events
- Choose the right gate and the right measure of location for a question
What this lesson covers
This lesson covers the mean, median and sample standard deviation of a small data set, why extreme values distort the mean, and how AND and OR gates combine independent failure probabilities. These are the arithmetic tools behind trend reports and fault tree questions on the exam and in daily safety work.
This lesson is included with a pass
Written lessons come with every ASP pass, along with the video lessons, the question bank, mocks and the tutor. $80 per exam or $143 for all three, for 180 days.