Question 1036092
The z values for each of these quintiles are -0.843,-0.253,+0.253 and +0.843
multiplied by the sd, they are -4.38,-1.32,1.32, and 4.38
rounding to the answer
the quintiles are (units are mpg)
17.82
20.88
23.52
26.58
z=(value-mean)/sd