Representation of Data

Question 0

What is the formula you can describe skew by using?

Answer 0

standard deviation

• A larger value means a greater skew

Question 1

Outliers are any values that are…

Answer 1

• Greater than upper quartile + 1.5 * IQR

- Lesser than lower quartile - 1.5 * IQR

Question 2

How can skew be describe through quartiles?

Answer 2

Positive: Q2 - Q1 < Q3 - Q2
Equal: Q2 - Q1 = Q3 - Q2
Negative: Q2 - Q1 > Q3 - Q2

Question 3

How can you use measures of location to describe skew?

Answer 3

Positive: mode < median < mean
Equal: mode = median = mean
Negative: mode > median > mean

Question 4

How can you see the skew from the shape from box plots?

Answer 4

Positive: Indicated by small distance between Q1 and median
Equal: Symmetrical
Negative: Indicated by small distance between median and Q3

Question 5

How can you see the skew from the shape of the diagram?

Answer 5

Positive: Peaks high and goes mostly downwards, /\\\\\
Equal: Peaks in middle, equal
Negative: Peaks towards end and goes mostly upwards ///////\