Calculating spread

Question 1

How is 2nd moment calculated?

Answer 1

2nd moment = sum of (distance from mean)^2 to each data point/ number of data points = variance

Question 2

How is 3rd moment calculated?

Answer 2

3rd moment = sum of (distance from mean)^3 to each data point/ number of data points

Question 3

How to calculate skewness

Answer 3

skewness= 3rd moment/SD^3

Question 4

How is 4th moment calculated

Answer 4

4th moment = sum of (distance from mean)^4 to each data point / number of data points

Question 5

How is kurtosis calculated?

Answer 5

kurtosis = 4th moment/ SD^4