The Average Waiting Time at the Checkout Counter for a Large

question 33

Short Answer

The average waiting time at the checkout counter for a large grocery chain is 2.45 minutes with a standard deviation of 24 seconds (0.40 minutes).Assume that the distribution of waiting time is normal.What proportion of the customers are served in between 1 minute and 2.5 minutes?

---

Definitions:

Sitting Up

The physical milestone in infant development where a baby can hold up their head and maintain an upright posture without support.

Rolling Over

A developmental milestone in infants, referring to the ability to turn the body from its back to its abdomen or vice versa, indicating progress in motor skills.

Responsive

The quality of reacting quickly and positively to stimuli or requests.

Female Voices

The vocal expressions of women, which can vary widely in pitch, tone, and quality.