- #1

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for example -

when calculating the error of the area of an annulus from two circular areas (ie subtracting one from the other, why is the positive error greater than the negative error

Thanks

- Thread starter lavster
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- #1

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for example -

when calculating the error of the area of an annulus from two circular areas (ie subtracting one from the other, why is the positive error greater than the negative error

Thanks

- #2

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like, say, you have $100 invested and you lose $20...that's a $20 loss....

Now you have $80...What percentage gain do you need to get your $20 back.....

20/80 is 25%.

figures don't lie, but liars figure!

- #3

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- #4

mathman

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Could you illustrate by an example what you are concerned about?

- #5

mfb

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Larger area: Both sides 10% longer, total area 1.1^2 = 1.21 of the original area (21% more).

Smaller area: Both sides 10% shorter, total area 0.9^2 = 0.81 of the original area (19% less).

Do you see the difference?

- #6

mathman

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I see the difference, but why do you see this as a problem?

Larger area: Both sides 10% longer, total area 1.1^2 = 1.21 of the original area (21% more).

Smaller area: Both sides 10% shorter, total area 0.9^2 = 0.81 of the original area (19% less).

Do you see the difference?

- #7

Khashishi

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- #8

mfb

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Where did I say that it is a problem?I see the difference, but why do you see this as a problem?

I just said that you can get asymmetric uncertainties in this way.

- #9

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ah great :) thanks :)

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