Calculate the MEDIAN of the data set. What do you get?
- A trimmed mean removes a small designated percentage of the largest and smallest values before calculating the average.
- Using a trimmed mean helps eliminate the influence of outliers or data points on the tails that may unfairly affect the traditional mean. (from Investopedia)
how can I do the trimming?. Any hint or video to watch?
I am watching a couple of tutorials on how to trim means. So, give me some time and I will attempt a response.
30Calculate the MEDIAN of the data set. What do you get?
Incorrect.
That's not the MEDIAN, that's the MEAN. They're not the same.I add up al the terms of the data set and divide the result by the total number of terms in the data set
sum= 300/3
=30
oh, okay, I understood you were asking me to find the mean.That's not the MEDIAN, that's the MEAN. They're not the same.
Calculate the MEDIAN of the data set. What do you get?
I shouted MEDIAN......I understood you were asking me to find the mean.
we trim means when there are outliers that are skewing the data distribution.I shouted MEDIAN......
Now tell us what did you learn about trimmed mean and how are those calculated.
I shouted MEDIAN......
Now tell us what did you learn about trimmed mean and how are those calculate
Jeff, I suppose they can ask me that because the mean is not very amenable to outliers, then they expect me to say, yes, but it needs to be trimmed.Eddy
I am not going to interfere with SK's assistance on mechanics. What I will ask is what does the question whether the mean is the right measure even mean?
I agree it is kind a dum question to ask.Jeff, I suppose they can ask me that because the mean is not very amenable to outliers, then they expect me to say, yes, but it needs to be trimmed.
because if they want me to say no, it is not the right measure, so there is no logic to their final question:
Compute the trimmed mean by removing only the outliers and not necessarily by trimming values from both ends.
but it is grist to my mill anyways because I have never heard about trimming the mean so it is a good one for me.I agree it is kind a dum question to ask.
I know what you mean, but let me tell you that there are many stupid questions around when it comes to math. teachers throw stuff around for students to answer without much thought. Not at least with the thought and logical thinking you put into them.Eddy
Here is my point.
If I want to know what the payroll of the company is, the mean is the right measure.
If I want to know what most people make in the company, the median, the mode, or a trimmed mean are all equally good.
You cannot tell which is a good measure until you know what its purpose is.
Do you really think that the middle number or numbers be different if you go from lowest to highest vs highest to lowest? If yes, then you need to learn what the middle means.median
arranging all numbers from least to greatest
90+80+18+18+17+16+16+16+15+14
14,15,16 ,16,16,17,18,18, 80,90
find the middle number
middle numbers=16,17
Adding them up =33 /2
median=16.5
I was taught yhat to find the median of a data set you need to arrange the data points from smallest to largest.Do you really think that the middle number or numbers be different if you go from lowest to highest vs highest to lowest? If yes, then you need to learn what the middle means.