# Psat study

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1. definition of integer
any whole number including posative, zero, and negative numbers

Example: -12, 0, 46
2. mean
add all the numbers up together and then divide the total by how many you added

Example: 1,2,3 1+2+3=6 6/3=2
3. Median
The median is the middle value

• Example: 1,3,1,2,3, first line them up 1,1,2,3,3, then look at the number in the middle
• Example: 1,4,2,5, First line them up 1,2,4,5, you see that there is no middle number, so you will add the two middle numbers and then divide them by two
4. Mode
The most common number

1,2,6,1,1,4, First line them up, 1,1,1,4,6, Then identify the most common number
5. Range
The distance between the highest and the lowest number

Example: 1,1,2,5,4,3,6, Identify the highest and lowest number: 1&6. Then subtract the lowest number from the highest number 6-1= 5 the range is 5
 Author: deamon ID: 41221 Card Set: Psat study Updated: 2010-10-11 02:19:32 Tags: Psat study Folders: Description: --- Show Answers: