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TI-83 Plus Statistics 363
SinReg Example: Daylight Hours in Alaska for One Year
Compute the regression model for the number of hours of daylight in
Alaska during one year.
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With noisy data, you will achieve better convergence results when you
specify an accurate estimate for
period
. You can obtain a
period
guess in
either of two ways.
•
Plot the data and trace to determine the x-distance between the
beginning and end of one complete period, or cycle. The illustration
above and to the right graphically depicts a complete period, or cycle.
1 period