testing header
Math Goodies is a free math help portal for students, teachers, and parents.
Free Math
Newsletter
 
 
Interactive Math Goodies Software

Buy Math Goodies Software
testing left nav
Math Forums @ Math Goodies
Math Forums @ Math Goodies
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 Homework Help Forums
 Basic Math and Pre-Algebra
 Pre-Algebra: 7th Grade: "Raise a Median"
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

Maeve75
New Member

USA
1 Posts

Posted - 09/09/2010 :  20:44:32  Show Profile  Reply with Quote
Note: each person has taken four tests and has one more test to take. Find the score that each person must make to change the mean or the median as shown.

Problem: Liz has scores of 87, 75, 82, and 93. She wants to raise the median to 87.

I know that you put the number in order from least to greatest. You then take the numeber in the middle if its an odd set of numbers. If its and even set you add the two middle numbers and divide that answer by 2. This will give you the median.

75, 82, 87, 93 = 82+87=169/2=84.5, median = 84.5. How do I raise it to make it a 87?

Edited by - Maeve75 on 09/09/2010 21:51:57
Go to Top of Page

Ultraglide
Advanced Member

Canada
299 Posts

Posted - 09/10/2010 :  16:54:01  Show Profile  Reply with Quote
Since you want the median to be 87 and there will be 5 tests, you need to make 87 the middle score. It follow that you need 2 above 87 nd 2 below. At present you have 1 above and 2 below, so.....
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Math Forums @ Math Goodies © 2000-2004 Snitz Communications Go To Top Of Page
This page was generated in 0.09 seconds. Snitz Forums 2000
testing footer
About Us | Contact Us | Advertise with Us | Facebook | Blog | Recommend This Page




Copyright © 1998-2014 Mrs. Glosser's Math Goodies. All Rights Reserved.

A Hotchalk/Glam Partner Site - Last Modified 21 May 2014