Statistics: Non-Parametric Tests – #225


Question: 9. In a large department store, the owner wishes to see whether the number of shoplifting incidents per day will change if the number of uniformed security officers is doubled. The table is the data for a sample of seven days before security is increased and seven days after the increase. Is there evidence to support the claim, at Alpha = 0..5, that there is a difference in the number of shoplifting incidents before and after the increase in security?

NUMBER OF SHOPLIFTING INCIDENTS

SUNDAY MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY
BEFORE 12 7 2 3 6 5 8
AFTER 4 5 3 0 3 1 4


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