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bachelor in business administration
Polytechnic State University Sanluis
Jan-2006 - Nov-2010
CPA
Polytechnic State University
Jan-2012 - Nov-2016
Professor
Harvard Square Academy (HS2)
Mar-2012 - Present
The data set in the accompanying table represents the number of industrial accidents in 12 manufacturing plants for 1-week periods before and after an intensive promotion on safety.

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a Do the data support the claim that the campaign was successful? What is the attained significance level? What would you conclude with α =.01?
b Discuss the problems associated with a parametric analysis designed to answer the question in part (a).
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