deana's deli has a mean delivery time of 23 minutes with a standard deviation of 2 minutes. determine the z-score for the number of sandwiches delivered in less than 24 minutes.

a. −0.5
b. 0.5
c. 11.5
d. 12

Z – score = 0.5

Step-by-step explanation:

Mean delivery time, μ = 23 minutes

Standard deviation, σ= 2 minutes

Given x = 24 minutes

Now, find the z-score for the number of sandwiches delivered in less than 24 minutes.

Using the formula,

Z – score =

⇒ Z – score =

⇒ Z – score = 0.5

Therefore, 0.5 is the z-score for the number of sandwiches delivered in less than 24 minutes.

-6 is the correct option from the above given options