Full moon Some people believe that a full moon elicitsunusual behavior in people. The table shows the numberof arrests made in a small town during weeks of six fullmoons and six other randomly selected weeks in thesame year. We wonder if there is evidence of a differencein the types of illegal activity that take place.a) Will you test goodness-of-fit, homogeneity, orindependence?b) Write appropriate null hypotheses.c) Find the expected counts for each cell, and explainwhy the chi-square procedures are not appropriate. Full Moon Not FullViolent (murder, assault, rape, etc.) 2 3Property (burglary, vandalism, etc.) 17 21Drugs/Alcohol 27 19Domestic Abuse 11 14Other Offenses 9 6
Full moon Some people believe that a full moon elicits
unusual behavior in people. The table shows the number
of arrests made in a small town during weeks of six full
moons and six other randomly selected weeks in the
same year. We wonder if there is evidence of a difference
in the types of illegal activity that take place.a) Will you test goodness-of-fit, homogeneity, or
independence?
b) Write appropriate null hypotheses.
c) Find the expected counts for each cell, and explain
why the chi-square procedures are not appropriate.
Full Moon Not Full
Violent (murder, assault, rape, etc.) 2 3
Property (burglary, vandalism, etc.) 17 21
Drugs/Alcohol 27 19
Domestic Abuse 11 14
Other Offenses 9 6
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