25 Jun Chi-Square Test of Independence
Question
Part III. Chi-Square Test of Independence
The following table is the result of a survey from a random sample of different crime victims.
Use the data to test the claim that the type of crime is independent of whether the criminal was a
stranger. Use a significance level of 0.05.
Criminal was a stranger
Criminal was an acquaintance
or relative
Homicid
e
12
39
Robbery
Assault
379
106
727
642
Hint: Instructions for performing this test in Stat Disk can be found in the Stat Disk User’s
Manual under the heading Chi Square Test of Independence (Contingency Tables).
Instructions
1. Just looking at the numbers in the
table, what is your best guess
about the relationship between
type of crime and criminal being a
stranger or not? Are they
independent or is there a
relationship?
2. Compute a Chi-Square Test of
Independence on this data using a
0.05 level of significance. Paste
your results here.
3. What are the null and alternative
hypothesis for this test?
4. What is the p-value for this result?
What does this represent?
5. State your conclusion related to the
context of this problem.
Answers
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