# On a standard measure of hearing ability the mean is 300 and the standard deviation is 20. What is the raw score for people whose z scores on this test are -4.5?

##### 1 Answer

May 15, 2018

The raw score for people whose z scores on this test are -4.5

#### Explanation:

#z=(x-barx)/sigma#

#-4.5=(x-300)/20#

#(x-300)/20=-4.5#

#x-300=-4.5 xx 20=-90#

#x=-90+300=210#

#x=210#

The raw score for people whose z scores on this test are -4.5