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CALC 1 Curve Fitting: Linear Example

Calculate the correlation, slope, intercept and estimates for the following data:

X Y
2 33
3 42
4 54
5 64
6 77

 

Data Entry
Value Key Display Description
  shift clr l 0 Clears the x and y lists.
33 = (CHN, ALG) or ENTER (RPN) 33.0000 Enters y value.
2 Σ+ 1.0000 Append x and y to lists x and y.
42 = or ENTER 42.0000 Enters y value.
3 Σ+ 2.0000 Append x and y to lists x and y.
Repeat for the remaining data.

Data can be verified and corrected using the List Manager.

Calculations
  shift Σx,y 270.00 y
20.00 x
Calculates the sum of lists x, y.
  crrl 0.9984 Calculates the correlation coefficient between lists x, y.
  slope 11.0000 Calculates the slope.
  intrcp 10.0000 Calculates the intercept.
6 y est 76.0000 Calculates the estimate of y.
3 y est 43.0000 Calculates the estimate of y.
50 shift x est 3.6364 Calculates the estimate of x.