I think you remember learning in school that there are three type of averages - mean, mode and median.
It was reported that the median age of the stall-holders in the wet market is 60.
That means if you line up all the stall-holders from the youngest to the oldest, the middle one is 60 years old. It also means there is an equal number of stall-holders above and below him.
My perception of this is that the stall-holders are not all old people waiting to retire. There are also many younger ones in their thirties or forties.
If it says that the mean age is 60, I would think that most of them are older people. (mean = total ages of all the stall-holders divided by the total number of stall-holders)
If the modal age is 60, it tells us that stall-holders with the age of 60 form the largest group. Again I think it would give the impression that stall-holders are mostly old people.
It was reported that the median age of the stall-holders in the wet market is 60.
That means if you line up all the stall-holders from the youngest to the oldest, the middle one is 60 years old. It also means there is an equal number of stall-holders above and below him.
My perception of this is that the stall-holders are not all old people waiting to retire. There are also many younger ones in their thirties or forties.
If it says that the mean age is 60, I would think that most of them are older people. (mean = total ages of all the stall-holders divided by the total number of stall-holders)
If the modal age is 60, it tells us that stall-holders with the age of 60 form the largest group. Again I think it would give the impression that stall-holders are mostly old people.
Eye drops
See this bottle of eye-drops, you have to throw it away 1 month after opening. One month has passed and I used it on one occasion only. I was thinking what else I could use it for ... For the past few days I have been using it to clean my spectacle lenses. It does the job quite well. Any other suggestions?
1 comment:
wow.. ur age theory is very chim
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