'__ ign ment Score: 85.7% Check Answer estion 7 of 'r > Some companies "grade on a hell curve" to compare the performance of their managers and professional workers. This forces the use of some low performance ratings so that not all workers are listed as "above average." Ford Motor Company' " 5 performance management process" for this year assigned 10% A grades, 80% B grades, and 10% C grades to the company's managers. Suppose Ford' 3 performance scores really are Normally distributed. This year, managers with scores less than 25 received C grades and those with scores of at least 475 received A grades. What is the mean of the scores? (Enter your answer as a whole number.) :I:: mean: What is the standard deviation of the scores? (Enter your answer rounded to one decimal place.) Question Source: Moore, The Basic Practice OfStatistics.8e | Publisher: w.H, Freeman