Respuesta :
Answer:
-1
Step-by-step explanation:
Given: Mean= 25 minutes.
Standard deviation= 2 minutes
x= 23 minutes.
Lets find the z-score for the number of sandwiches delivered in less than 23 mins.
Formula: Z-score= [tex]\frac{x-mean}{standard\ deviation}[/tex]
Z-score= [tex]\frac{23-25}{2}[/tex]
⇒ Z-score= [tex]\frac{-2}{2}[/tex]
∴ Z-score will be -1
Hence, -1 is the z-score for the number of sandwiches delivered in less than 23 minutes.
