Many companies "grade on a bell 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’s "performance management process" for a time assigned 10% a grades, 80% b grades, and 10% c grades to the company's 18,000 managers.
suppose that ford's performance scores really are normally distributed. this year, managers with scores less than 35 received c's and those with scores above 425 received a's. what are the mean and standard deviation of the scores?
a. μ = 230.0 and σ = 152.3
b. μ = 230.0 and σ = 167.5
c. μ = 230.0 and σ = 140.3
d. μ = 225.0 and σ = 152.3
e. μ = 250.0 and σ = 175.8
f. μ = 250.0 and σ = 168.6

Which statement holds true for absolute value functions? •the absolute value determines the direction in which theb.the coefficient determines the line along which the graph,the distance between the left and the right arm is based od.the vertex coordinates and the absolute value determine 111

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.