Homework Help: Math- HELP

Posted by Denim on Sunday, March 4, 2007 at 11:44am.

How do I Find the first and third quartiles, Q1 and Q3, of the following set of numbers?

13,4,12,16,8,14,8,3,10,8

order the data:
3,4,8,8,8,10,12,13,14,16

Quartile I ends at 8
The quartile II ends at 9.
quartile III ends at 13

The calculation of the quartiles is sometimes not quite clear (especially if the number of observations of a sample is not divisible by four). We therefore provide exact instructions how to calculate the quartiles. Assuming a sample of N observations the quartiles are defined as follows ("round" stands for the rounding to the nearest integer):

1. quartile: the value of the sorted series of observations having the position x = round(0.25*(N+1))
2. quartile (median): if N is even, Q2 is the mean of the two values at the positions N/2 and N/2+1; if N is odd, Q2 is the value at the position (N+1)/2
3. quartile: the value of the sorted series having the position x = round(0.75*(N+1))

Example:

No one has answered this question yet.

Answer this Question

Related Questions

Math - Find the first and third quartiles, Q1 and Q3, of the following set of ...
MAth - iFind the first and third quartiles, Q1 and Q3, of the following set of ...
Math - Find the first and third quartiles, Q1 and Q3, of the following set of ...
math - Find the first and third quartiles, Q1 and Q3, of the following set of ...
math - find the first and third quartiles, Q1, and Q3, of the following numbers...
math - find the first and third quartiles,Q1and Q3,of the following set of ...
math - can someone check my answers subtract 7/9-(-13/19)=3/2 multiply (4)(-3/2...
math - Please help me to find the first and third quartiles, Q1 and Q3, of the ...
Math - Find the first and third quartiles of the following set of numbers. 13,4,...
Math - What are the first and third quartiles of the following set of number. 13...

For Further Reading

First Name:
School Subject:
Answer: