Representation of Data Flashcards

0
Q

What is the formula you can describe skew by using?

A

standard deviation

• A larger value means a greater skew

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1
Q

Outliers are any values that are…

A
  • Greater than upper quartile + 1.5 * IQR

- Lesser than lower quartile - 1.5 * IQR

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2
Q

How can skew be describe through quartiles?

A

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

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3
Q

How can you use measures of location to describe skew?

A

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

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4
Q

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

A

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

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5
Q

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

A

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

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