13.For a new case, go to step 2.

Variables Used:

 

B

Regression coefficient (y–intercept of a straight line); also

 

used for scratch.

M

Regression coefficient (slope of a straight line).

R

Correlation coefficient; also used for scratch.

X

The x–value of a data pair when entering data; the

 

ˆ

 

hypothetical x when projecting yˆ; or x (x–estimate)

 

when given a hypothetical y.

Y

The y–value of a data pair when entering data; the

 

ˆ

 

hypothetical y when projecting x ; or yˆ (y–estimate)

 

when given a hypothetical x.

Statistics registers

Statistical accumulation and computation.

Example 1:

Fit a straight line to the data below. Make an intentional error when keying in the third data pair and correct it with the undo routine. Also, estimate y for an x value of 37. Estimate x for a y value of 101.

X

40.5

38.6

37.9

36.2

35.1

34.6

Y

104.5

102

100

97.5

95.5

94

Keys:

Display:

Description:

(In RPN mode)

 

 

S

 

Starts straight–line routine.



 

 

 

Enters x–value of data pair.

value

 

 

Statistics Programs 16-9

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HP 35s Scientific manual S ,  