How Early Is Early?

 Rufous Hummingbird scientist Mike Patterson, holding another bird with a rufous breast--an American Robin!

Mike Patterson heard from most hummingbird watchers how early the hummingbirds appeared to arrive in 2003. He wondered: How early? Using data collected over the last three seasons, Mike compared the previous earliest records to those received in 2003. Now it's your turn:

YOU be the Scientist!
Work with Mike's data to calculate the answers he was looking for:

1. How many days earlier did each location report hummingbirds? (We've done the first two for you.)
2. How many 2003 sightings were LATER than a previous early date?
3. What date did the first Rufous Hummingbird appear in Gig Harbor, Washington, in 2003?
4. What date did the first Rufous Hummingbird appear in Philomath, Oregon, in 2003?
5. Which place had the biggest difference between 2003's early date and the previous one?
6. The average is _________________days ahead of past records.

(Notice this! To make calculations simpler, Mike doesn't put the dates in his "date" column. Instead, he uses the calendar number. For example, a report for January 1—the first day of the year—would be number 1. January 31 would be 31. February 1 would be 32. February 28 would be 59.)