CP | precision capability | USL − LSL |
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CPK | process capability | Min(CPU, CPL) | |||
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| 3 σ |
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| 3 σ |
Note: In statistics mode, all function keys are available except those used for
Ex. 9: Enter the following data {2, 5, 5, 5, 5, 9, 9, and 9} and calculate Σx, Σx2, n, x , S, CP, and CPK, where USL value = 12 and LSL value = 2.
In STAT mode | [ 2ndF ] [ STAT ] | DEG | STAT | 0.00 |
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| [ DATA ] 2 | DEG | STAT | 2. |
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| [ DATA ] 5 | DEG | STAT | 5. |
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| [ DATA ] 5 | DEG | STAT | 5. |
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| [ DATA ] 5 | DEG | STAT | 5. |
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Enter all data | [ DATA ] 5 | DEG | STAT | 5. |
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| [ DATA ] 9 | DEG | STAT | 9. |
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| [ DATA ] 9 | DEG | STAT | 9. |
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| [ DATA ] 9 | DEG | STAT | 9. |
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| [ | ENTER | DEG | STAT | 0.00 |
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| DEG | STAT |
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| x = ? | [ x | ] | 6.13 |
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n = ? | [ n ] |
| DEG | STAT | 8.00 |
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S = ? | [ S ] |
| DEG | STAT | 2.59 |
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Σx = ? | [ 2ndF] [ Σx ] | DEG | STAT | 49.00 |
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Σx 2 = ? | [ 2ndF ] [ Σx2] | DEG | STAT | 347.00 |
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σ= ? | [ 2ndF ] [ σ ] | DEG | STAT | 2.42 | σ | ||||||
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| [ 2ndF ] [ CP ] 12 | DEG | STAT | 12. USLCP | |||||
CP = ? | [ENTER] 2 | DEG | STAT | 2. LSLCP | |||||||
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| [ENTER] | DEG | STAT | 0.69 CP | |||||
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| [ 2ndF ] [ CPK ] | DEG | STAT | 12.00 USLCPK | |||||
CPK = ? | [ENTER] | DEG | STAT | 2.00 LSLCPK | |||||||
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| [ENTER] | DEG | STAT | 0.57 CPK | |||||
Note: The calculator retains the data you have entered until you exit statistics mode. The data is retained even if you turn off the calculator or it automatically turns off.
Viewing Statistics Data
Press [ DATA ] or [ENTER] in edit (ED) mode to view the statistics data you have entered. (If you press [ DATA ] the item number of the data appears briefly before the value.)
Ex.10: View the data entered in Ex. 9.
Method 1
1.Press [ 2ndF ] [ EDIT ] to enter edit mode.
2.Press [ DATA ] once to view the first data item.
DEG ED STAT |
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dAtA 1 | 1.5 seconds | → | 2.00 |
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3.Continue pressing [ DATA ] to display each data item. You will see data 2, 5.00, data 3, 5.00, data 4, 5.00, data 5, 5.00, data 6, 9.00, data 7, 9.00, data 8, 9.00 in sequence.
Method 2
1. Press [ENTER] once to view the first data item.
DEG ED STAT | 2.00 |
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2.Continue pressing [ENTER] to display each data item. You will see 5.00, 5.00, 5.00, 5.00, 9.00, 9.00, 9.00 in sequence.
Adding a Data Item
Ex. 11: To add a 9th data item, of value 10, to the Ex. 9 dataset:
1. Press [ DATA ] 10 | DEG | ED STAT | 10. |
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The calculator updates the statistics as you enter data. You can then recall the statistics to get : x = 6.56, n = 9.00, S = 2.74, Σx = 59.00, Σx 2 = 447.00 and σ= 2.59.
Editing Statistics Data
Ex.12: Change the value of data item 1 in Ex. 9 from 2 to 3.
Method 1
1.Press 2 [ 2ndF ] [ DEL ] 3
Method 2
1. | Press [ 2ndF ] [ EDIT ] | DEG | ED | STAT | 0.00 |
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2. | Display 2 by pressing [ DATA ] or | DEG | ED | STAT | 2.00 |
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3. | Enter 3 to overwrite 2. | DEG | ED | STAT | 3. |
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4.Press [ENTER] to make the change.
5.Press [ 2ndF ] [ EDIT ] to exit edit mode.
Ex.13: Based on Ex.9, delete the first data entry (of value 2).
Method 1
1.Press 2 [ 2ndF ] [ DEL ] to delete 2.
Method 2
1. | Press [ 2ndF ] [ EDIT ] | DEG | ED | STAT | 0.00 |
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2. | Display 2 by pressing [ DATA ] or | DEG | ED | STAT | 2.00 |
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3. | Press [ 2ndF ] [ DEL ] | DEG | ED | STAT | 5.00 |
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4.Press [ 2ndF ] [ EDIT ] to exit edit mode.
Delete Error
If you try to delete a value that is not in the dataset, dEL Error appears. (Existing data is not affected.)
Ex.14: Delete 7 from the dataset in Ex.9.
1.Press 7 [ 2ndF ] [ DEL ]
2.Press any key to clear the message. Ex.15: Delete 5 × 5 from the dataset in Ex.9.
1.Press 5 [ × ] 5 [ 2ndF ] [ DEL ]
2.Press any key to clear the message.
DEG | STAT |
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| dEL | Error |
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DEG | STAT | 0.00 |
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DEG | STAT |
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DEG | STAT | 0.00 |
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Weighted Data Entry Method
Instead of entering each data item individually, you can enter the value and the number of occurrences of that value (up to 255). The data from Ex.9 can be entered as follows:
Value | Number of occurrences | Alternative method |
2 | 1 | [ DATA ] 2 |
5 | 4 | [ DATA ] 5 [ × ] 4 |
9 | 3 | [ DATA ] 9 [ × ] 3 |
where item 1 = 2, items 2 to 5 = 5, and items 6 to 8 = 9.
Error Conditions
The indicator FULL appears when any of the following conditions occur. Further data entry is not possible. Press any key to clear the indicator. Providing that you remain in statistics mode, previously entered data entries are unaffected.
•You attempt to enter more than 80 data items.
•The number of occurrences of of any particular data value is greater than 255
•The product of the number of data items and the number of occurrences is greater than 20400.
© Copyright 2002
Reproduction, adaptation or translation without prior written approval is forbidden except as allowed under copyright laws.
Printed in China. | HDPMR178E23 MWB |
HP part number: |
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