Statistics: Hypothesis tests: Z-test – #491


Question: Question 1

You are to determine if there is a significant difference in the following interrogation techniques and whether they produced helpful information.

Torture Retain/Interview Interview Hypnosis
Yes 104 125 32 25
No 14 17 25 19

a) Conduct a chi-square analysis and assume the expected values to be equal. Be sure to state your hypotheses and state your findings in statistical jargon and plain English (1 point).

b) Conduct a chi-square analysis on each technique separately and assume the expected values to be equal. For example, conduct a chi-square analysis for torture vs. information meaningful (yes/no). Do your findings differ among techniques? Be sure to state your hypotheses and state your findings in statistical jargon and plain English (2 points).

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