Sharp EL-9600 manual Other Regressions Model of Best FIT, Model of best fit

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NAME _____________________________________________________ CLASS __________ DATE __________

9.2

OTHER REGRESSIONS

AND MODEL OF “BEST FIT”

Steps for calculating other regression models

1. To find the best-fitting quadratic curve (y = ax2 + bx + c) for the data, press

+–

⋅ ⎟

STAT , touch D REG, double touch 04 Rg_x2, and press ENTER .

2. To view the overlay of the regression curve and the scatter diagram, press Y= CL VARS , touch H STAT, press ENTER , touch B REGEQN, double touch 1 RegEqn, and press GRAPH . The following overlay

will be displayed.

Model of best fit

1.Notice, the r 2 value for the quadratic regression model is about .9337.

2.Whereas ther 2 value for the exponential regression model was .9786.

3.The exponential regression model (with the r 2 value closer to 1) is considered the better-fitting model. The exponential regression model even fits better than the linear model with an r 2 value of .8553.

4.Continue this analysis with other regression models.

Blackline Masters/STATISTICS USING THE SHARP EL-9600

83

Copyright © 1998, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.

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Contents Sharp E L 9 6 0 Statistics Ii Statistics Using the Sharp EL-9600 Contents Creation of a Page Stat EnterList Method of Teaching For Discussion Chapter two 1Stats Method of Teaching Using Blackline Master Additional Problems Chapter three Enter Page Save this data set by pressing 2ndF For Discussion Chapter four Enter DEL Quit TraceStat Plot Enter Enter 2ndF Chapter five Touch a Edit List , touch To enter the statistics menu For Discussion Chapter six Page Page 2Stats. Press Page Find the numerical descriptions of the following data sets Chapter seven DEL Enter Source U.S. Environmental Protection Agency Math For DiscussionAdditional Problems Page Linear Regressions Linear Regressions/STATISTICS Using the Sharp EL-9600 Linear Regressions/STATISTICS Using the Sharp EL-9600 Method of Teaching Scattr Additional Problems Other Regressions Touch D REG, touch On the screen, double touch 10 Rgaebx, Method of Teaching Using Blackline Master Additional Problem Statistical Tests Statistical Tests/STATISTICS Using the Sharp EL-9600 Method of Teaching Using Blackline Master Statistical Tests/STATISTICS Using the Sharp EL-9600 For Discussion Contents Reproducible Blackline Masters Creation of a ONE-VARIABLE Data SET Steps for creating a non-weighted one-variable data setDouble touch 1 StoLD, press Steps for creating a weighted one-variable data setActivity 2 Creating a weighted one-variable data set Activity 1 Creating a non-weighted one-variable data setONE-VARIABLE Data SET Numerical Description of a ONE-VARIABLE Data SET Numerical Description of a ONE-VARIABLE Data SET Numerical Description of a ONE-VARIABLE Data SET To view the histogram, press Graph Steps for creating a non-weighted data sets histogramSteps for creating a weighted data sets histogram Activity 2 Creating a weighted data sets histogram Activity 1 Creating a non-weighted data sets histogramOther Graphical Portrayals of a Stat Plot ONE-VARIABLE Data SET Creation of a TWO-VARIABLE Data SET Steps for creating a non-weighted two-variable data setSteps for creating a weighted two-variable data set Activity 2 Creating a weighted two-variable data set Activity 1 Creating a non-weighted two-variable data setNumerical Description TWO-VARIABLE Data SET Quit Stat Numerical Description TWO-VARIABLE Data SET Zoom Graphical Portrayal TWO-VARIABLE Data SETGraphic Portryal of a TWO-VARIABLE Data SET Drawing a scatter diagram of a two-variable data setGraphical Portrayal TWO-VARIABLE Data SET Graphic Portrayal TWO-VARIABLE Data SET Access the data entry screen and delete the old data setLinear Regressions Steps for calculating the best-fitting lineGraph Calculating the best-fitting line Access the data entry screen and delete old dataActivity 2 Calculate and plot the regression line Activity 1 Calculate and plot the regression lineSteps for calculating other regression models Other RegressionsModel of best fit Other Regressions Model of Best FITActivity 2 Calculate the power regression model Activity 4 Which regression model fits the best? Statistical Tests EXE 10.3 Sharp EL-9600 Graphing Calculator Keypad forSolutions to Selected Activities Answer Key/STATISTICS Using the Sharp EL-9600 Teaching Notes

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