Figure 3

When the calculator switches to register-based mode, some key points to consider:

•You may enter an unlimited number of data points.

•The statistics editor, accessed with v¡, is not available.

•While use of \¢is allowed, viewing previously entered data is not possible.

•The only regression mode available is a linear regression.

One-Variable Statistics

To enter x-data for one-variable statistics complete the following steps:

1.Clear the statistical registers by pressing \t.

2.Enter the first value and press ¡. The HP 10bII+ displays n, the number of items accumulated.

3.Continue accumulating values by entering the numbers and pressing ¡. The n-value is increased with each entry.

Two-Variable Statistics and Weighted Mean

To enter x,y pairs of statistical data complete these steps:

1.Clear the statistical registers by pressing \t.

2.Enter the first x-value and press Æ. The HP 10bII+ displays the x-value.

3.Enter the corresponding y-value and press ¡. The HP 10bII+ displays n, the number of pairs of items accumulated.

4.Continue entering x,y pairs. The n-value is increased with each entry.

To enter data for calculating the weighted mean, enter each data value as x, and its

corresponding weight as y in the statistics memory. Press \Tto calculate the weighted mean.

Statistical Calculations 115