Question 493:On a police sergeants exam, the historical mean scored was 80 with a standard deviation of 20. Four offiers scored 195,175,191, and 189 respectively. Irregularity.The officers were alleged cronies of the police chief because of their scores. Convert these four offiers socres to a standardized Z-value. Do you think there is sufficient reason to question these four exam scores; and if so how did you make this determination.