Calculating spread Flashcards
1
Q
How is 2nd moment calculated?
A
2nd moment = sum of (distance from mean)^2 to each data point/ number of data points = variance
2
Q
How is 3rd moment calculated?
A
3rd moment = sum of (distance from mean)^3 to each data point/ number of data points
3
Q
How to calculate skewness
A
skewness= 3rd moment/SD^3
4
Q
How is 4th moment calculated
A
4th moment = sum of (distance from mean)^4 to each data point / number of data points
5
Q
How is kurtosis calculated?
A
kurtosis = 4th moment/ SD^4
