Texas Instruments TI-83 PLUS - Manual (Page 329)

TI-83 Plus Statistics 326
31. Press £
20
¤ to enter a string length of
20 cm.
Press Í to calculate the predicted time of
about 0.92 seconds.
Based on the residual analysis, we would
expect the prediction of about 0.92 seconds to
be within about 0.02 seconds of the actual
value.