1.Key in the program.

2.Press CLEAR .

3.Key in the first Oi value and press .

4.Key in the first Ei value and press .

5.Repeat steps 3 and 4 for all data pairs. The x2 value is displayed.

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

KeystrokesDisplay

 

CLEAR

 

25

1.25

 

 

 

20

 

 

17

1.70

 

 

 

20

 

 

15

2.95

 

 

 

20

 

 

23

3.40

 

 

 

20

 

 

24

4.20

 

 

 

20

 

 

16

5.00

X2

20

 

 

Normal Distribution

The normal (or Gaussian) distribution is an important tool in statistics and business analysis. The following HP-12C program gives an approximation to the upper tail area Q under a standardized normal distribution curve, given x. The upper tail area signifies the probability of occurrence of all values ≥x.

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