HP user manual User's Guide download pdf (Page 124)

Statistical Calculations116

Viewing and Editing Statistical Data

1. P r e s s v¡to open the editor. The number of items accumulated, n, is displayed,

along with the current x-or y-value. The STAT annunciator appears, and the X or Y

identifies the displayed value.

2. Press 1to move up through the current statistical data. When you pass the maximum

of the data, an empty statistical pair displays before wrapping back to x

, provided

there is enough memory for more data.

3. Press

A to move down through the current statistical data. At x

, the display wraps

back to the maximum y-value.

4. At any time with the editor open, press ¡ to return to x

. To jump to a specific data

pair, type the whole number which represents the pair’s n-value and press ¡. The

editor will jump to that data pair, unless your entered number is higher than your

maximum data pair, in which case it will jump to the highest x-value. If you type in an

invalid number, such as a negative number, or a non-whole number, the editor remains

in its current position.

5. To delete the currently displayed statistical data pair, press a. To add a new pair

with the x- and y-values equal to zero, press P.

6. To replace the currently displayed value, simply type in the new number and press

Æ.

7. To clear the currently displayed x-or y-value without removing the entire pair, press |

to set the value to 0.

8. Press M to exit the editor.

Example 1

A tropical beach resort has been having some very hot weather lately. A manager at the

beach resort has noticed an increase in the number of cold drinks sold during hot days and

wants to be able to predict how many employees are needed to sell drinks tomorrow. Each

employee can sell 200 drinks a day at most.

Table 12-2 Data

Past 3 Days

Temperature (Celsius)

Cold Drinks Sold

32 415

35 515

38 725

1 2 ... 119 120 121 122 123 124 125 126 127 128 129 ... 186 187

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HP user manual User's Guide Page 124