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Posted on Jan 02, 2017
The keystrokes you would use to solve the problem is as follows:
(I will use the / to indicate the division symbol)
Posted on Jun 08, 2010
SOURCE: whenever i enter coordinates for
Before doing statistics, you have to prepare the calculator by clearing old data that may generate errors.
A. TO CLEAR OLD DATA
To obtain the correlation coefficient in a statistical analysis on the TI8xPlus family of calculators you must activate the DIAGNOSTICSON option. To access the command
D. ENTER THE DATA
Type in your D (X ) values in L1 and the N (Y) values in L2 (see picture 1). Sorry the picture does not have YOUR values.
TO OBTAIN statistical RESULTS (optional)
Notice the Down Arrow next to n=7. That means the results screen has more values. Press the Down Arrow to display.
You notice that the n=7 line now has an arrow pointing Up. Notice the Down Arrow on the bottom line (more data is coming). Here is the rest of the statistical results.
There is no arrow at the bottom of the picture. End of statistical results.
The screen captures with 2-Var Stats summarize all the statistics.
However there is no correlation coefficient, no line of best fit, etc. To obtain that you have To perform a regression analysis.
E. PERFORM A REGRESSION ANALYSIS
To perform a regression analysis, you must try several regression models and then find the one that mimics the raw data best. Select Regression model ( exponential, linear, sine, quadratic, etc.) Here I selected Exponential
You also have r and its square.
Since the equation is saved in the Y1 function it can be superposed on the scatter plot. You just have to press GRAPH and it will be drawn. But that will not tell how good the fit is, until you see the function drawn on top of the raw data.
F. DRAWING THE SCATTER PLOT AND BEST FIT CURVE ON SAME SCREEN
Regardless of the curve of best fit, you can draw a scatter plot as follows.
Here plot1 is active (ON), it is scatter plot (first icon) the XLIST is L1 by default but you can change it to some other list. Notice the highlighted A cursor on XLIST line. It means that the [ALPHA] keyboard is active.
On the line Mark you can choose the appearance of the raw data point.
And here are your two graphs: the raw data scatter plot and the line of best fit on the same screen. On the picture the ZoomStat option was used.
The graph above represents a parabola and has nothing to do with the sample data entered. But it shows the raw data and the curve of best fit on the same screen.
Posted on Sep 05, 2010
1. put all the problem in your calculator .. 6x^2-18x^3+12x^2
2. To put the X on the calculator you have to press ALPHA and the button with this sign " ) " .
2. then you have to equalized you requation to zero .. you do that by persing ALPHA and the the buttom that says CALC .. and then you write 0
3. Press SHIFT and the buttom " = "
Posted on Dec 14, 2010
The x intercept is where your line will cross the x axis. Therefore, the value for y at this point is 0. Substitute 0 for y in this equation and solve for x.
6x + 3(0) = 27
x = 27/6
x = 4 1/2
x intercept = (4 1/2, 0)
Follow the same reasoning for the y intercept.
6(0) + 3y = 27
y = 27/3
y = 9
y intercept = (0,9)
Now plot these two points and draw your line through them.
Posted on May 18, 2012
Pretty hard to help you directly. 3" is a pretty small plane if you mean the length of it, and pretty big if you mean the width.... try Google images for "plane buck", maybe a picture will help. Good luck.
Posted on Nov 05, 2012
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