Linear Regression Calculation using Scientific Calculator

Share

Have you known how to use your scientific calculator to get linear regression equation? If haven't.. here's the tutorial. It is really simple :D. This tutorial used Casio Scientific Calculator fx-570 MS, for other type I think it would be similar, for other brand.. uhm, you have to find it by yourself :P

1. You have to clear all data first.
   Press"SHIFT" >>> Press "CLR">>>Press "3" (ALL) >>> Display: Reset All >>> Press "=">>> Press "AC".
2. Set the calculator to Linear Regression mode
   Press "MODE" twice >>> Press "2" (REG) >>> Press "1" (Lin)
3. Data Entry
   Do data entry one by one with "x comma y" format
   For example, you have data like this:
   

   time (hours)	Distance (m)
   1	3
   2	5
   3	6.8

   
   Then do data entry like this:
   Press "1" >>> Press "," >>> Press "3" >>> Press "M+" >>> Display n = 1
   Press "2" >>> Press "," >>> Press "5" >>> Press "M+" >>> Display n = 2
   Press "3" >>> Press "," >>> Press "6" >>> Press ".">>> Press "8">>>Press "M+" >>> Display n=3
4. To know gradient, y-intercept, Correlation coefficient  value
• Gradient (B)
  Press "SHIFT" >>> Press "2" >>> Press ">" (next button) twice >>> Press "2" (B) >>> Press "=" >>> Display (for the above example: B          1.9)
• y-intercept (A)
  Press "SHIFT" >>> Press "2" >>> Press ">" (next button) twice >>> Press "1" (A) >>> Press "=" >>> Display (for the above example: B          1.1333333)
• Correlation coefficient (r)
  Press "SHIFT" >>> Press "2" >>> Press ">" (next button) twice >>> Press "3" (r) >>> Press "=" >>> Display (for the above example: r          0.9995386). If you need R square, just use the square button.
Now, you get the equation : y = Bx+A >>> y = 1.9x +1.13333333 ( r = 0.9995386)
5. Ah, you can check the entered data whether you entered the correct data or no.
   Press "down" or "up" botton, you will see x1, y1, Freq1 to xn, yn, Freqn depending your data.

Artikel Terkait/Related Articles