bcvillastwo
DIS Veteran
- Joined
- Dec 20, 2002
- Messages
- 649
I am not trying to be picky but I think the OP may have mixed up his statitical terms. I think Average and Mean essentially are the same thing. The way these tables are constructed I think the OP should have used Mode in place of Mean. Mean is "middle" value and that is what the OP seems to be calculating but instead of calling it mean, they've called it "median" (which is actually the average). I could be wrong about this but I don't think so.
Check out this web site to see an introductory discussion on statistics including definitions of mode, average, mean, and median.
http://www.shodor.org/interactivate/lessons/sm1.html
Here are the definitions for mode, average, mean, and median that I pulled from the web site.
mode
For lists, the mode is the most common (frequent) value. A list can have more than one mode. For histograms, a mode is a relative maximum ("bump")
average
It is better to avoid this sometimes vague term. It usually refers to the (arithmetic) mean, but it can also signify the median, the mode, the geometric mean, and weighted means, among other things
mean
The sum of a list of numbers, divided by the total number of numbers in the list. Also called arithmetic mean
median
"Middle value" of a list. The smallest number such that at least half the numbers in the list are no greater than it. If the list has an odd number of entries, the median is the middle entry in the list after sorting the list into increasing order. If the list has an even number of entries, the median is equal to the sum of the two middle (after sorting) numbers divided by two. The median can be estimated from a histogram by finding the smallest number such that the area under the histogram to the left of that number is 50%
Check out this web site to see an introductory discussion on statistics including definitions of mode, average, mean, and median.
http://www.shodor.org/interactivate/lessons/sm1.html
Here are the definitions for mode, average, mean, and median that I pulled from the web site.
mode
For lists, the mode is the most common (frequent) value. A list can have more than one mode. For histograms, a mode is a relative maximum ("bump")
average
It is better to avoid this sometimes vague term. It usually refers to the (arithmetic) mean, but it can also signify the median, the mode, the geometric mean, and weighted means, among other things
mean
The sum of a list of numbers, divided by the total number of numbers in the list. Also called arithmetic mean
median
"Middle value" of a list. The smallest number such that at least half the numbers in the list are no greater than it. If the list has an odd number of entries, the median is the middle entry in the list after sorting the list into increasing order. If the list has an even number of entries, the median is equal to the sum of the two middle (after sorting) numbers divided by two. The median can be estimated from a histogram by finding the smallest number such that the area under the histogram to the left of that number is 50%