Descriptive Statistics

Dispersion. Dispersion refers to the spread of the values around the central tendency. There are two common measures of dispersion, the range and the standard deviation. The range is simply the highest value minus the lowest value. In our example distribution, the high value is 36 and the low is 15, so the range is 36 – 15 = 21.

The Standard Deviation is a more accurate and detailed estimate of dispersion because an outlier can greatly exaggerate the range (as was true in this example where the single outlier value of 36 stands apart from the rest of the values. The Standard Deviation shows the relation that set of scores has to the mean of the sample. Again lets take the set of scores:

Descriptive Statistics

Central Tendency. The central tendency of a distribution is an estimate of the “center” of a distribution of values. There are three major types of estimates of central tendency:

Mean

Median

Mode

Tips for the SAT Essay (get a perfect score) – YouTube

Tips for the SAT Essay

Writing: Counter Arguments – YouTube

Writing: Counter Arguments

GRE Revised General Test: Score Level Descriptions

Sustains insightful, in-depth analysis of complex ideas

develops and supports main points with logically compelling reasons and/or highly persuasive examples

GRE Revised General Test: Analyze an Issue

This page contains the Issue topics for the Analytical Writing section of the GREĀ® revised General Test. When you take the test, you will be presented with one Issue topic from this pool.

GRE Essay : Analyze an issue

The following general format keeps these points in mind. We suggest you make a similar format of your own for each of the six sets of instructions that GRE uses.