Viewing and Editing Statistical Data

1.Press 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 x1, provided there is enough memory for more data.

3.Press Ato move down through the current statistical data. At x0, the display wraps back to the maximum y-value.

4.At any time with the editor open, press ¡to return to x1. 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 Mto 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

Cold Drinks Sold

Temperature (Celsius)

 

 

 

32

415

 

 

35

515

 

 

38

725

 

 

116 Statistical Calculations