Statistics: spread

Interpret variation in the original units.

How to study this source

• How do we reason under uncertainty?

  commentaryNamed section and worked examples

  Interpret variation in the original units.

• What can a small dataset tell me, and what can it not?

  core2.7 Measures of the Spread of the Data

  Describe spread and keep the units visible.

Ideas and questions

Read background definitions when a term blocks the argument. Then return to the source and reconstruct its claim in your own words.

Read alongside, read against

• Statistics: centre

  Barbara Illowsky · Susan Dean. Compare assumptions, evidence and scope with the source above. These are editorial companions, not necessarily direct responses.

• Probability: terminology

  Barbara Illowsky · Susan Dean. Compare assumptions, evidence and scope with the source above. These are editorial companions, not necessarily direct responses.

• Probability: independent and mutually exclusive events

  Barbara Illowsky · Susan Dean. Compare assumptions, evidence and scope with the source above. These are editorial companions, not necessarily direct responses.

• Probability: two basic rules

  Barbara Illowsky · Susan Dean. Compare assumptions, evidence and scope with the source above. These are editorial companions, not necessarily direct responses.

• Probability: contingency tables

  Barbara Illowsky · Susan Dean. Compare assumptions, evidence and scope with the source above. These are editorial companions, not necessarily direct responses.