Answer:
a
Step-by-step explanation:
The Z-score is calculated by the formula below

Step 2: Substitute the given parameters in the formula

Hence, the z-score of a person who scored 145 on the exam is -0.5
Answer:

Step-by-step explanation:
The square root of 11 is 3.31... this could be the answer.
The number of shoppers per day would be 192 and the number of shoppers per hour would be 24. hope this helps