7.087547766 is the standard deviation for those figures.
Variance = 17.9047619 Standard Deviation = 4.23140188
15
It is 15 points.
The range is 12 and the standard deviation is 3.822448314.
99.6% for
3.898717738 is the standard deviation.
The standard deviation for the Woodcock-Johnson III Tests of Achievement is typically set at 15. This is consistent with many standardized tests, which use a mean of 100 and a standard deviation of 15 to represent scores on a normal distribution. This allows for the interpretation of individual test scores in relation to the broader population.
IQ is based on an average of 100 and a standard deviation of 15 for any group
The formula for calculating the standard error (or some call it the standard deviation) is almost the same as for the population; except the denominator in the equation is n-1, not N (n = number in your sample, N = number in population). See the formulas in the related link.
Variance = 17.9047619 Standard Deviation = 4.23140188
The Z test.
15
It would be 3*5 = 15.
About 98% of the population.
It is 15 points.
The range is 12 and the standard deviation is 3.822448314.
It is 3.045