Univariate Data

NZ Level 5

Centre or Spread ?

The two dot plots below represent the scores of students from two classes in the most recent grade test.

a

Without performing any calculations, which class has the greater MAD?

Class A

A

Class B

B

Class A

A

Class B

B

b

If a student scored below their class average, in which class would they prefer to be?

Class A

A

Class B

B

Class A

A

Class B

B

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Plan and conduct surveys and experiments using the statistical enquiry cycle:– determining appropriate variables and measures;– considering sources of variation;– gathering and cleaning data;– using multiple displays, and re-categorising data to find patterns, variations, relationships, and trends in multivariate data sets;– comparing sample distributions visually, using measures of centre, spread, and proportion;– presenting a report of findings

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