Mean and Standard Deviation
no it can not
Can s be negative?
1. find the distance of each observation from the mean and square the distances 2. average the distances by dividing the sum by n-1 3. the standard deviation is this average squared distance
How do you find the standard deviation of n observations?
it is calculated by finding an average of the square distances and then taking the square root of the result
How is Standard Deviation (s) calculated?
the median is resistant
Is the median or the mean resistant?
it measures the average distance of their observations from their mean
What does Standard Deviation (s) measure?
the center
What does the mean measure?
n stands for the number of observations
What does the n stand for?
standard deviation
What does the variable s stand for?
the average
What is another name for the mean?
variance
What is the average square distance called?
standard deviation
What is this formula?
the mean formula
What is this formula?
when all the observations are of the same value
When does s=0?
a big S
Would you have a big S or small s with a lot of spread?
a small s
Would you have a big S or small s with a small amount of spread?