Here’s a whirlwind tour of one of the most frequently tested sets of concepts on the GMAT Quantitative section: GMAT statistics. You don’t have to be an expert on statistics: a little goes a long way. Let’s learn some basic descriptive statistics formulas and go from there. Descriptive Statistics Formulas The Mean One very important GMAT […]

# Archive | Statistics

## Standard Deviation on the GMAT

First, here are some challenging practice questions: 1) Set S has a mean of 10 and a standard deviation of 1.5. We are going to add two additional numbers to Set S. Which pair of numbers would decrease the standard deviation the most? (A) {2, 10} (B) {10, 18} (C) {7, 13} (D) {9, 11} […]