You need more than one number to calculate a standard deviation, so 9 does not have a standard deviation.
7
The standard deviation of the population. the standard deviation of the population.
The standard deviation is 0.
The standard deviation in a standard normal distribution is 1.
mean | 30 median | 18 standard deviation | 35.496
Variance = 17.9047619 Standard Deviation = 4.23140188
7
The standard deviation is the standard deviation! Its calculation requires no assumption.
7.087547766 is the standard deviation for those figures.
The standard deviation of the population. the standard deviation of the population.
The range is 9 and 3.01 is the standard deviation.
The standard deviation is 0.
Information is not sufficient to find mean deviation and standard deviation.
σ=2.49
It is 2.61, approx.
Standard deviation is the square root of the variance.
The standard deviation in a standard normal distribution is 1.