Standard deviation

(e) Nothing can be known about the value of the median since the 50 test scores are not given. than to In year 2000, the mean salary in a certain plant was $1,500 and the standard deviation was $400. In year 2001, each employee got a $100 raise in salary. In year 2002, each employee's salary was increased by 20%. The mean and standard deviation of the salaries in year 2002 are 0 = 460= 160000 1 = 1500 (a) Mean = $1,920 Standard Deviation = $480 (b) Mean = $1,920 Standard Deviation = $400 Mean = $1,900 Standard Deviation = $580 (d) Mean = $1,900 Standard Deviation = $416 (e) None of these