Ice-Out
Analyzing
116 Years of Ice-out Data
Lake Minnetonka, Minnesota
(Back
to Journey North Ice-out
Contest)
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| Scattergram
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- Print the scattergram.
- At first glance, do you see any pattern?
- Draw a line on the scattergram to show the average ice-out date for Lake Minnetonka. (To find the average, use the ice-out records on this table.)
- On the scattergram, find the five years when ice-out occurred the EARLIEST.
- Next, find the five years when ice-out occurred the LATEST.
- Do you see any patterns?
- How else might you display the data?
- People concerned about global warming use ice-out dates as one measure of climate change. Do you see a warming trend, based on data from this lake?
