Mean/Median Problem

[tomato]

Hello there!

Here's my problem:

During the 3hr period from 9am to 12noon on a certain day, a bank teller observed that customers arrived at the following hours...

9:05 9:35 9:50 10:15 10:30 10:40
10:55 11:15 11:28 11:40 11:58

If the time between any 2 successive arrivals is called interarrival time, find the mean and median interarrival time.

~Am I supposed to simply calculate the mean and median with all of the times given? The "interrarival time" thing really throws me off. Any help would be much appreciated!

 

[Unco]

For example, the first interarrival time is 9:35 - 9:05 = 30 mins.

 

[tomato]

Thanks for the quick response! Here's what I got:

mean= 17.3
median= 15

Seem right??

Thanks again!

 

[Unco]

Yep, they seem right.

 

[tomato]

Thanks Unco! :wink: