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(Solved by Expert Tutors) On a police sergeant?s examination, the historical mean>



On a police sergeant?s examination, the historical mean

score was 80 with a standard deviation of 20. Four officers who were alleged to be cronies of the police chief scored 195, 171, 191, and 189, respectively, on the test. This led to allegations of irregularity in the exam.

-Convert these four officers? scores to standardized z-values.
-Do?you?think?there?was?sufficient?reason?to?question?these?four?exam?scores??
-What?assumptions?are?you?making?

 


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Apr 19, 2020

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