It means the results (the information given) are spread out meaning the space in-between the results is quite big
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You need more than one number to calculate a standard deviation, so 9 does not have a standard deviation.
In the same way that you calculate mean and median that are greater than the standard deviation!
Standard deviation in statistics refers to how much deviation there is from the average or mean value. Sample deviation refers to the data that was collected from a smaller pool than the population.
The probability is 0.5
Yes, a standard deviation can be less than one.