Master Key to the GRE Vol. 4

Statistics & Data Interpretation

Need help with Statistics, Probability, Combinatorics, or Charts & Graphs? You've come to the right place.

Volume 4 of Master Key to the GRE is the only guide to GRE math that will teach you everything you need to know about Statistics, Probability, Combinatorics, and Data Interpretation ("Charts & Graphs").

Samples

Chapter 2 Preview

Combinatorics

Counting

Statistics & Data Interpretation Preview

Video Solutions for Practice Questions

Over 800 of these included with the book

Table of Contents

Chapter 1

Statistics

Fundamental Concepts

Whether you’re aiming for a perfect score or a score closer to average, mastery of the following concepts is essential.

  1. 1
    Introduction
  2. 2
    Averages
  3. 3
    Weighted Averages
  4. 4
    Medians & Modes
  5. 5
    Equally Spaced Number Sets
  6. 6
    Range, Quartiles, & Boxplots
  7. 7
    Standard Deviation
  8. 8
    Normal Distributions

Rare or Advanced Concepts

The following concepts are either advanced or are tested only on rare occasions. If you don’t need an elite math score, don’t waste your time!

  1. 9
    Random Variables Peaks & Tails
  2. 10
    Maximization Problems
  3. 11
    The Weighted Average Shortcut
  4. 12
    Counting & Adding Equally Spaced Numbers

Practice Questions

There’s no substitute for elbow grease. Practice your new skills to ensure that you internalize what you’ve studied.

  1. 13
    Problem Sets
  2. 14
    Solutions
  3. 15
    Video Solutions

Chapter 2

Combinatorics

Fundamental Concepts

Whether you’re aiming for a perfect score or a score closer to average, mastery of the following concepts is essential.

  1. 1
    Introduction
  2. 2
    Counting
  3. 3
    Factorials
  4. 4
    Permutations
  5. 5
    Duplicate Arrangements
  6. 6
    Combinations
  7. 7
    Separate Pools
  8. 8
    Summary

Rare or Advanced Concepts

The following concepts are either advanced or are tested only on rare occasions. If you don’t need an elite math score, don’t waste your time!

  1. 9
    “Must Be Together” Problems Reverse Combinations
  2. 10
    Circular Arrangements
  3. 11
    “Fake Combinatorics” Questions
  4. 12
    Special Notation
  5. 13
    Slot Diagrams for Combinations

Practice Questions

There’s no substitute for elbow grease. Practice your new skills to ensure that you internalize what you’ve studied.

  1. 14
    Problem Sets
  2. 15
    Solutions
  3. 16
    Video Solutions

Chapter 3

Probability

Fundamental Concepts

Whether you’re aiming for a perfect score or a score closer to average, mastery of the following concepts is essential.

  1. 1
    Introduction
  2. 2
    The Probabilities Add to One
  3. 3
    From Zero to One
  4. 4
    Multiple Events
  5. 5
    “AND” Probabilities
  6. 6
    “OR” Probabilities
  7. 7
    Complements
  8. 8
    The “At Least Once” Shortcut
  9. 9
    Brute Force
  10. 10
    Summary

Rare or Advanced Concepts

The following concepts are either advanced or are tested only on rare occasions. If you don’t need an elite math score, don’t waste your time!

  1. 11
    Unknown Relationships
  2. 12
    “Of Phrases”
  3. 13
    “At Least Twice or More”

Practice Questions

There’s no substitute for elbow grease. Practice your new skills to ensure that you internalize what you’ve studied.

  1. 14
    Problem Sets
  2. 15
    Solutions
  3. 16
    Video Solutions

Chapter 4

Data Interpretation

Fundamental Concepts

Whether you’re aiming for a perfect score or a score closer to average, mastery of the following concepts is essential.

  1. 1
    Introduction
  2. 2
    Tackling the Questions
  3. 3
    Before Answering the Questions
  4. 4
    Approximation
  5. 5
    Digesting the Diagrams

Math Concepts

Data Interpretation questions feature a variety of math concepts. You’ll find a proper review of those concepts here.

  1. 6
    Conversions
  2. 7
    Taking the Percent of a Number
  3. 8
    Percent Changes
  4. 9
    Percent Relationships
  5. 10
    Ratios, Averages & Medians
  6. 11
    Overlapping Sets
  7. 12
    Probability
  8. 13
    Math Drills

Traps & Tricks

Familiarizing yourself with the graphs that you’ll encounter on the GRE, and the classic “traps” and “tricks” that come with them, is vital for mastering Data Interpretation questions.

  1. 14
    Bar Graphs
  2. 15
    Data Tables & Rare Diagrams
  3. 16
    Pie Charts
  4. 17
    Multi-Figure Data Sets
  5. 18
    Line Graphs

Practice Questions

There’s no substitute for elbow grease. Practice your new skills to ensure that you internalize what you’ve studied.

  1. 19
    Summary
  2. 20
    Problem Sets
  3. 21
    Solutions
  4. 22
    Video Solutions

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