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Practice

Order an evidence review

Arrange the steps for evaluating a claimed relationship.

Customer survey · evidence boundary

High respondent satisfaction does not erase low response

Invited
400
Targeted customers
Responded
40
Observed sample
Satisfied
32
80% of respondents
Survey response rate10%
10%

The 80% satisfaction result describes the 40 respondents. Nonresponse may make them different from all 400 invited customers.

Arrange in the correct order
  1. 1. Report what the evidence supports and does not support
  2. 2. Seek a comparison or design that reduces uncertainty
  3. 3. Identify confounders and rival explanations
  4. 4. Review how observations were selected and measured
  5. 5. State the exact claim and variables