Math Goodies is a free math help portal for students, teachers, and parents.
|
Interactive Math Goodies Software

testing left nav
Math Forums @ Math Goodies
Home | Profile | Register | Active Topics | Members | Search | FAQ
 All Forums  Homework Help Forums  Basic Math and Pre-Algebra  mean,meadian,(basic math) New Topic  Topic Locked  Printer Friendly
Author  Topic

wmdschristie3
Junior Member

USA
5 Posts

 Posted - 09/19/2007 :  18:37:01 Help me with these homework questions please!The sum of the heights of all the students in a class is 1,472in.1. the mean height is 5ft 4in. How many students atre in the class? (1ft=12in.)I changed 5ft to 60in. then I added 4in. and divided 2 into 64in. The answer I got was 32 students. Is this correct?#2. The median height is 5ft2in. How many students are 5ft 2in.or taller? How many are shorter? I changed 5ft to 60in then added 2in and got that 62 students are taller. After, I subtracted 2in. from 60 and got 58 students are shorter. Is this correct? PLEASE HELP!!!!

Mrspi

USA
998 Posts

 Posted - 09/19/2007 :  19:13:32 quote:Originally posted by wmdschristie3Help me with these homework questions please!The sum of the heights of all the students in a class is 1,472in.1. the mean height is 5ft 4in. How many students atre in the class? (1ft=12in.)I changed 5ft to 60in. then I added 4in. and divided 2 into 64in. The answer I got was 32 students. Is this correct?#2. The median height is 5ft2in. How many students are 5ft 2in.or taller? How many are shorter? I changed 5ft to 60in then added 2in and got that 62 students are taller. After, I subtracted 2in. from 60 and got 58 students are shorter. Is this correct? PLEASE HELP!!!!Changing 5 ft 4 inches to 64 inches is an excellent first step.Then, remember thataverage height = total of heights / number of studentsSo, if you let n = number of students,64 = 1472 / nMultiply both sides by n:64n = 1472Now...you should be able to find n.Once you know the number of students in the class, you should remember that the median divides the data into two equal parts. So you should be able to figure out how many students are at or above the median height.
Topic
 New Topic  Topic Locked  Printer Friendly Jump To: Select Forum New Visitor Forum       Testing Forum Homework Help Forums       Basic Math and Pre-Algebra       Algebra       Geometry and Trigonometry       Pre-Calculus and Calculus       Probability and Statistics       Standardized Test Preparation Help       Miscellaneous Math Topics Educator Forum       Teacher Talk Parent Forum       Parent's Place  -------------------- Home Active Topics Frequently Asked Questions Member Information Search Page
 Math Forums @ Math Goodies © 2000-2004 Snitz Communications