Posted by My worst subject is math on Friday, September 4, 2009 at 5:01pm.
First -- I added the 14 numbers and they totaled 130.
If you forgot to include a 2 in your post, your answer would be right -- the mean is 8.8.
The mixed fraction would be 8 8/10 = 8 4/5.
This site should help you understand this term.
http://www.mathsisfun.com/mixed-fractions.html
The mean is the average of a set of numbers. The average of 4, 8, 9 is 7.
The median is the middle number of a set of numbers. The mean of 4, 8, 9 is 8.
You have only 14 entries. Assuming you just didn't type one of the numbers in, 8.8 is correct. I would write that as a mixed fraction as 8-8/10 where - stands for a space (not a minus sign) and read as 8 and 8/10.
Yes I am sorry there was a typo there is supposed to be a 2...
also how would i subtract the median and the mean?
Thank you Ms Sue
I didn't check your math. As a mixed fraction..
132/15=8 4/5
Median: rank the data in order. Find the center data point (median), half is greater, half is less.
What do you think is more useful?
(median-mean) is a measure of the tighness of the data, that is, are their wild extreme points?
Take the data 1,2,3,4, 100000000
the median is 3, the mean is a very big number. Which is more useful? What does median-mean mean here?
Why do you need to subtract the median and the mean?
What is the mean of your 15 numbers?
By the way I wrote it as 8 8/10 and didn't reduce it to the smallest numbers (as Ms. Sue did) because the problem didn't say in its simplest form. So I read 8.8 as 8 8/10. (But one of my teachers told me MANY years ago) that Bob, you ALWAYS reduce a fraction to its smallest term EVEN though I didn't tell you to do it.)
the mean of the 15 numbers is 132 divided by 15 = 8.8 which is 8 8/10 and the last part of the question which is question e) what is (median - mean=)
since my teacher didn't say to reduce it to simplest form should I do it anyways??
I'd follow DrBob's advice and reduce the fraction.
You know the mean of these 15 numbers. Now write them in numerical order. The median is the middle number.
ok so I am going to reduce it
8 and 4/5 - 9 equals -1/5?
median I got was 9
I didn't figure the median -- but assuming it's 9, you should state the problem this way:
9 - 8 4/5 = 1/5
Express the fractions 1/2, 3/16, and 7/8 with an LCD.
A. 8/16, 3/16, 14/16
B. 4/8, 6/8, 14/8
C. 1/32, 3/32, 7/32
D. 1/4, 3/4, 7/4