Scenario: Historians are interested in the accuracy of eyewitness accounts of traumatic events. One study examined survivors' recall of the sinking of the ship Titanic (Riniolo, Koledin, Drakulic, & Payne, 2003). The researchers reviewed the transcripts of survivors' testimony at governmental hearings (www.titanicinquiry.org) to see whether they testified that the ship was intact or breaking apart during the ship's final plunge (it was in fact breaking apart). To test for eyewitness accuracy, testimony of 20 survivors was examined to see if there was an equal likelihood of survivors saying the ship was intact or breaking apart.

Data:

testimony

breaking apart

intact

breaking apart

breaking apart

breaking apart

intact

breaking apart

breaking apart

intact

breaking apart

breaking apart

intact

breaking apart

breaking apart

breaking apart

breaking apart

breaking apart

intact

breaking apart

breaking apart

Proposed analysis and why you chose the analysis: (1 mark)

Scales of measurement (i.e., nominal, ordinal, interval or ratio) for variable(s) that will be used in the analysis: (1 mark)

Null and alternative hypotheses (based on context of study) in symbols: (1 mark)

Test assumptions and make a decision (please provide written evidence to support your decision): (1 mark)

Inferential statistic(s) and p-value(s): (1 mark)

Decision: (1 mark)

Conclusion: (2 marks)

Based on your decision, identify and explain the type of error you could be making with respect to the conclusions of the study (1 mark)