Waiting times​ (in minutes) of customers in a bank where all customers enter a single waiting line and a bank where cust

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Waiting times​ (in minutes) of customers in a bank where all
customers enter a single waiting line and a bank where customers
wait in individual lines at three different teller windows are
listed below. Find the mean and median for each of the two​
samples, then compare the two sets of results.
Single Line
6.3
6.6
6.7
6.8
6.9
7.1
7.4
7.7
7.7
7.7
Individual Lines
4.0
5.3
5.9
6.1
6.3
7.7
7.7
8.5
9.4
10.0
The mean waiting time for customers in a single line is
nothing
minutes.