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Performing Statistical Calculations

kEstimated Value Calculation ( , )

After drawing a regression graph with the STAT mode, you can use the RUN • MAT mode to calculate estimated values for the regression graph’s x and y parameters.

Example

To perform a linear regression using the nearby data

 

and estimate the values of ŷ and x̂ when xi = 20 and

 

yi = 1000

1. From the Main Menu, enter the STAT mode.

2. Input data into the list and draw the linear regression graph.

3. From the Main Menu, enter the RUN • MAT mode.

4. Press the keys as follows. ca(value of xi)

K5(STAT)2(ŷ)w

The estimated value ŷ is displayed for xi = 20. baaa(value of yi)

1(xˆ )w

xi

yi

10

1003

15

1005

20

1010

25

1011

30

1014

The estimated value xˆ is displayed for yi = 1000.

# You cannot obtain estimated values for a Med-

quartic regression, sinusoidal regression, or

Med, quadratic regression, cubic regression,

logistic regression graph.

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