Answer:
27 1/4
Step-by-step explanation:
The standard deviation is 2.6832815729997
SD^2=(12-12)^2+...+(14-12)^2/10
SD^2=72/10
SD^2=7.2
SD=squeare root of 7.2
SD=2.6832815729997
-5yards+-8yards=-13yards
