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University of Canterbury, Christchurch

STAT101 tutoring at UC

Statistics 1

Digital Humanities, 100-level

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Choose the method before doing the arithmetic

STAT101 introduces statistics and probability with an emphasis on selecting sensible techniques and interpreting results. Before calculating, ask what the data represents and what question you are trying to answer.

Practice prompt: you want to describe typical waiting time for a service, but a few waits are much longer than the rest. Would a mean or a median better describe a typical wait?

  1. Sketch or sort the waiting times to see their shape and any unusually long waits.
  2. Compare what the mean and median each represent for this data.
  3. State your choice in context and mention what the summary leaves out.

Check your reasoning

The median is usually the clearer description of a typical wait here because a few very long waits can pull the mean upward. Still report the long waits separately: a median alone could hide a service problem that matters to the people who waited longest.

An original practice prompt, not a UC assessment question. Topics checked against the UC course description.

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