# A population has a mean of 24.8 and a standard deviation of 4.2. If #x_i =19#, what is the #z#-value?

##### 1 Answer

Aug 29, 2017

#z=-1.38#

#### Explanation:

Given -

Mean

Standard Deviation

#x_i=19#

#z=(x-barx)/sigma#

#z=(19-24.8)/4.2=(-5.8)/4.2=-1.38#

#z=-1.38#