Posted by **Denim** on Monday, March 5, 2007 at 12:25am.

Can someone help me figure this out?

1. Find the first and third quartiles, Q1 and Q3 of the following numbers:

347,242,146,391,249,567,277,218,319

and

0.16,0.08,0.27,0.20,0.22,0.32,0.25,0.18,0.28,0.27

2. Which of the following numbers are integers?

75,9.82,-1/14,-498,0.71

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:

## Answer This Question

## Related Questions

- math115 - Heres the problem find the first and third quartiles of the following ...
- math115 - find the first and the third quartiles 347,242,146,391,249,567,277,218...
- 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 - Please help me to find the five-number summary of the following set of ...
- math - find the first and third quartiles, Q1, and Q3, of the following numbers...
- math - Please help me to find the first and third quartiles, Q1 and Q3, of the ...
- math - find the first and third quartiles,Q1and 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 ...

More Related Questions