In this module, you'll learn all of the concepts, techniques and strategies needed to answer statistics questions on the GMAT. In particular, this module covers:

 Mean, median and mode Range Weighted averages Standard deviation

### Two ways to prepare

Beneath each video lesson in this module, we have a Related Resource box with practice questions that test the concepts covered in the video. With this lesson format, you have two learning options:

• Watch the video lesson first and then reinforce your learning by answering several related questions, or…
• Tackle the practice questions first and watch the lesson only if you need help with the concepts the practice questions test

## GMAT STATISTICS VIDEOS

• 1. Lesson: Mean, Median & Mode (5:27)
• 2. Question: Adding k to a Set (1:12)
• 3. Question: Ages of Ann, Bea and Cho (3:21)
• 4. Question: Greatest of 5 numbers (2:30)
• 5. Lesson: When Mean = Median (2:22)
• 6. Lesson: Weighted Averages (8:00)
• 7. Lesson: Range and Standard Deviation (10:10)
• 8. Question: Ordering Standard Deviations (2:09)
• 9. Question: Comparing Standard Deviations (1:25)
• 10. Lesson: More Standard Deviation (3:01)
• 11. Question: Units of Standard Deviation (1:26)
• 12. Question: Greater than 25 (1:58)
• 13. Question: New Standard Deviation (1:33)
• 14. Question: Mean and Median of Set T (0:54)
• 15. Question: Heights of 6 Children (2:58)
• 16. Question: Combined Test Scores (2:06)
• 17. Question: Truth About Sets A & B (3:40)
• 18. Question: The Range of Set A (2:55)
• 19. Question: Removing x (3:29)
Total viewing time for the GMAT Statistics module: 61 minutes.

NOTE: In each of the above video lessons, you’ll find a Related Resources box containing several practice questions that are specifically related to the concepts covered in that lesson (e.g., the lesson on standard deviation). Conversely, the practice questions below cover a variety of topics under the umbrella of GMAT Statistics, and are intended for general reinforcement.

Given this, you may find it beneficial to work on the questions below after you’ve mastered the module content by watching the video lessons and answering concept-specific practice questions from the Related Resources boxes. For more on this learning strategy, visit our course overview page.

Problem Solving (level of difficulty: 350 to 500)

Public transportation

1.75 standard deviations

Change in mean

Problem Solving (level of difficulty: 500 to 650)

Money spent at dinner

Beef and veal

Homes in town X

Q consecutive integers

Median and range of 25

Sum of the two smallest

Combined averages

Average of four numbers

Change in standard deviation

Problem Solving (level of difficulty: 650 to 800)

Cricket player

College theses

82 consecutive odd integers

Tom’s diet

Seven distinct integers

21 different numbers

Data Sufficiency (level of difficulty: 350 to 500)

Eleven consecutive integers

Standard deviation of set Q

Shipment of oranges

Is x less than 16?

Data Sufficiency (level of difficulty: 500 to 650)

Shelves J and K

Set K

Does mean = median?

Data Sufficiency (level of difficulty: 650 to 800)

Employed or over 65

Comparing salaries

## Practice from the Official Guides

Official Guide for GMAT Review (2017 edition)

Problem Solving: 14, 20, 26, 38, 47, 71, 88, 99, 120, 125, 141, 148, 150, 155, 184, 206, 214

Data Sufficiency: 244, 281, 284, 331, 336, 348, 354, 367, 368, 375, 378, 381, 390, 392, 394, 397

Official Guide for GMAT Review (2016 edition)

Problem Solving: 10, 15, 20, 32, 79, 88, 111, 112, 124, 131, 133, 137, 157, 170, 196, 212

Data Sufficiency: 14, 45, 47, 88, 92, 103, 110, 123, 124, 132, 135, 138, 152, 155, 157, 162

Official Guide for GMAT Review (2015/13th edition)
Problem Solving: 12, 16, 30, 53, 67, 91, 101, 109, 112, 132, 145, 183, 208

Data Sufficiency: 20, 37, 38, 70, 84, 87, 95, 109, 110, 120, 121, 123, 139, 143, 146, 154

While answering practice questions from the Official Guide for GMAT Review (2017, 2016 or 2015), you can enter your responses directly into our downloadable Improvement Chart. This will help track your progress and identify areas of weakness.