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Download Sinusoidal Data Worksheet - Pre-Calculus - Fall 2007 | MATH 175 and more Assignments Pre-Calculus in PDF only on Docsity!
Ss Sinusoidal Data Worksheet Tidal Analysis: EXAMPLE FOR: Fill in the following chart for the two-day period (so four low tides and high tides all inter-distributed) for the Central or Southern California Coastal Region assigned to you... sce: http://tbone.biol.sc.edu/tide/sites_uswest.html Time elapsed since midnight Height of tide, Low of first day, t h(t) (L) or High (#) Date Time (decimal form : rounded to (feet) Tide (PDT) closest huridredth) . 6/07 02:43 2.72 . 432 H 6/7/07 10:03 10.05 -0.15 L 6/1/07 17:22 17.37 4.14 H 6/7107 22:47 22.78 2.45 L 6/8/07 04:01 28.02 3.82 H 6/8/07 10:48 34.80 0.27 L 6/8/07 17:56 41.93 4.55 H 6/9/07 wa n/a " wa L » Load third and fourth columns into ZL, & L, , into your graphing calculators, : respectively. Turn ON your STAT PLOT to graph a scatterplot of L, & ZL, data in Plot] with the fle aber . default “box” niarker for the “points” from the ordered pairs. % } ing S$ Push ZOOM 9 to activate the ZoomStat feature to look at the “plotted” data points. 7 apes simethin a : Alter the WINDOW settings as desired, to establish “buffers” as explained in class. l x: L448, 49 7. 4° P61 ; Perform a Sinusoidal Regression on L, & L, by using the following : STAT > CALC (scroll down to option “C” [SinReg] and press enter) y That will post the SinReg command to the homescreen, and now you will need to follow that command with 5 items (# of iterations, X-list variable, Y-list variable, period guess, i & ¥, (to store the regression equation into Y, [the first equation in the Y= menu] for ft hy future graphing purposes), each separated by commas. Insert “3” for the # of iterations, eur dt L, for the X-list variable , ZL, for the Y-list variable, and “12” for the period guess ik (since there are two cycles of a low and high tide for each 24 hour day). Remember that vane) you get the ¥, “pasted in” from the list off Y= variables through the following :: VARS > >> ENTER>1. 
