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no it is not possible because you have to take the square of error that is (x-X)2. the square of any number is always positive
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Improved answer:
It is not possible to have a negative standard deviation because:
SD (standard deviation) is equal to the square of V (variance).
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Can standard deviation be a negative?
No. Standard deviation is the square root of a non-negative number (the variance) and as such has to be at least zero. Please see the related links for a definition of standard deviation and some examples.
Is it possible that in standard normal distribution standard deviation known and mean unknown?
it is possible to distribute standard deviation and mean but you dont have to understand how the mouse runs up the clock hicorky dickory dock.
What are the four numbers have the smallest possible standard deviation?
If all four numbers are the same, there is no standard deviation. The mean will be equal to all 4 numbers, resulting in a 0 standard deviation. Ex) 5,5,5,5
When is a t test better than a z score?
When you don't have the population standard deviation, but do have the sample standard deviation. The Z score will be better to do as long as it is possible to do it.
What are the assumptions of standard deviation?
The standard deviation is the standard deviation! Its calculation requires no assumption.
