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After computing the standard deviation for a set of measurements you notice your answer is negative. Is this possible?
Wiki User
∙ 8y ago
Anand Mehta said the answer is No. And here is why.
To find the SD, you subtract each term from the mean (and there will be some negative numbers) BUT then you have to square these amounts and that will get rid of any negatives. Then you find the sum and divide by the number of terms. The final step is to find the square root. The SD is the positive square root. So there is no way that you can get a negative number for the SD.
Wiki User
∙ 8y ago
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Is The standard deviation of all possible sample proportions increases as the sample size increases?
The standard deviation would generally decrease because the large the sample size is, the more we know about the population, so we can be more exact in our measurements.
Is it possible that the standard deviation is less than one?
Yes, a standard deviation can be less than one.
Is it possible to live in a world without negative integers?
No. Inventory and engineering work need negative numbers to measure. Also, how can we measure the temperature if it's freezing cold without negative numbers? Integers are needed for calculations and measurements in this world.
What is the non-example of inches in measurements?
A gram is one possible answer.
Is it possible for the standard deviation to be less than the sample mean?
Absolutely. In fact I would commonly expect it to be. If, for example, the sample mean for the length of a bolt was 5.5 cm, you would certainly hope the standard deviation was a lot less than 5.5 cm. or it would imply bolts with a negative length (not quite sure how you'd do that without breaching some alternate dimension - no pun intended.)
Is it possible for a standard deviation to be negative?
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----------Improved answer:It is not possible to have a negative standard deviation because:SD (standard deviation) is equal to the square of V (variance).
Is The standard deviation of all possible sample proportions increases as the sample size increases?
The standard deviation would generally decrease because the large the sample size is, the more we know about the population, so we can be more exact in our measurements.
Is it possible that the standard deviation is less than one?
Yes, a standard deviation can be less than one.
Is it possible for the mean and standard deviation to be equal?
Yes.
Is it possible to live in a world without negative integers?
No. Inventory and engineering work need negative numbers to measure. Also, how can we measure the temperature if it's freezing cold without negative numbers? Integers are needed for calculations and measurements in this world.
What is 5 feet subtract 10 feet?
-5
What is the stardard deviation for a mean of 4.33?
Without more information, it isn't possible to determine the standard deviation from the mean alone.
When should you convert metric measurements to standard US measurements?
as often as possible
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
Is it possible that population standard deviation is given but population mean is not given?
Yes.
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.
