mean, median, modes homework help!!

• Sep 17th 2008, 05:02 PM
mymim1
mean, median, modes homework help!!
am trying to help grand son answer home work question. help! Question is write a set of data in which mean is 15 median is 15 and the modes are 13 and 15. Know I'm over the hill bet please help
• Sep 17th 2008, 05:05 PM
Jhevon
Quote:

Originally Posted by mymim1
am trying to help grand son answer home work question. help! Question is write a set of data in which mean is 15 median is 15 and the modes are 13 and 15. Know I'm over the hill bet please help

ok, lets start at the beginning. do you know what "mean", "mode" and "median" mean?
• Sep 17th 2008, 06:00 PM
Jhevon
Quote:

Originally Posted by mymim1
am trying to help grand son answer home work question. help! Question is write a set of data in which mean is 15 median is 15 and the modes are 13 and 15. Know I'm over the hill bet please help

for the record, you should respond to my posts here.

now since you know the definitions, i don't suppose any of this will come as a surprise to you

so lets do this.

lets make up some data, for simplicity, we will take 5 values. i will write our values in ascending order, and an unknown x

13, 13, 15, 15, x

now we want:

$\displaystyle \text{Mean } = \frac {13 + 13 + 15 + 15 + x}5 = 15$

now solve for x

can you see why i choose the data like that? do you see why it works?
• Sep 17th 2008, 06:07 PM
mymim1
thank you so much
yes i was able to help him do the problem thanks to your help! Old age has it's way of stumping ones mind!
Thank you(Bow)
• Sep 17th 2008, 06:26 PM
Jhevon
Quote:

Originally Posted by mymim1
yes i was able to help him do the problem thanks to your help! Old age has it's way of stumping ones mind!
Thank you(Bow)

i remember being young too
• Oct 19th 2008, 08:18 PM
mathgeek2000
Quote:

Originally Posted by Jhevon
for the record, you should respond to my posts here.

now since you know the definitions, i don't suppose any of this will come as a surprise to you

so lets do this.

lets make up some data, for simplicity, we will take 5 values. i will write our values in ascending order, and an unknown x

13, 13, 15, 15, x

now we want:

$\displaystyle \text{Mean } = \frac {13 + 13 + 15 + 15 + x}5 = 15$

now solve for x

can you see why i choose the data like that? do you see why it works?