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path: /students/cas-exams/mas-i
title: "MAS-I: Modern Actuarial Statistics I — study guide"
description: "MAS-I (Modern Actuarial Statistics I) study guide: format, syllabus topics, and study tips for the CAS exam path. Probability models, statistics, and the foundations of stochastic processes for actuaries."
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# MAS-I: Modern Actuarial Statistics I — study guide

Probability models, statistics, and the foundations of stochastic processes for actuaries. This guide covers the format, the syllabus topics, and how to study for MAS-I on the path to your CAS credentials. Always confirm current fees, dates, and syllabus weights on the official page before you register.

## Format

Computer-based, multiple-choice

## What it covers

- Probability models (stochastic processes, frequency and severity)
- Statistics and parameter estimation
- Extended linear models
- Time series with constant variance

## How to study

- MAS-I is a step up in breadth from P and FM — start early.
- Work the official content outline objective by objective.
- Confirm current syllabus weights on the CAS exam page before you plan.

## Where it sits on the path

MAS-I is a preliminary requirement administered by the CAS. See the full CAS path from preliminary exams through the ACAS and FCAS designations.