Representation of Data.

Question 1

State the formula used to calculate skewness.

Answer 1

(3(mean-median))/standard deviation; +ive = =ive skew, 0 = symmetrical, -ive = -ive skew.

Question 2

How else might you calculate skewness?

Answer 2

Compare the ranges between quartiles:
Q2-Q1=Q3-Q2=roughly symmetrical.
Q2-Q1Q3-Q2=-ively skewed.