Counter History for last 10 days

This is a very generic question, but I have always wondered how I should interpret the box entitled "Counter History for the last 10 Recorded days" and "Session - Total" that appears on the Admin homepage.

It always give as range, such as:

04/03/2011 999 - 3923
04/02/2011 898 - 4861
04/01/2011 1230 - 5664

How should I interpret that? Looking at the notation for 4/3/2011, does that mean that we really had 3923 hits/users visit our website? Why the range of numbers?

Thank you.

Donna
https://www.eco-homestore.cm

04/03/2011 999 - 3923

On April 3, 2011 there were 999 new sessions (first hit to the site) and those people hit 3923 pages ...

Ajeh:

On April 3, 2011 there were 999 new sessions (first hit to the site) and those people hit 3923 pages ...
If a person leaves my site and later in the same day comes back, will they be added to the counted number again? Or will they be ignored because they are returning?
https://www.classic-flatware.com

I am just asking because I added Googles Adsense, and I feel I might be losing customers.

Every session created from the first hit is counted in the first value ...

This means if I come to your site at 9:00am and visit 12 pages, the first number gets incremented by 1 and the second number gets incremented by 12 ...

Later, if I come back to your site at 11:00am and hit 9 pages, again the first number gets incremented by 1 and the second number by 9 ...

Thank you. That clears up a few of my questions.