Calculating single-variable statistics, Calculating single-variable statistics ,18-2 – HP 50g Graphing Calculator User Manual

Page 569

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Page 18-2

Store the program in a variable called LXC. After storing this program in RPN
mode you can also use it in ALG mode.

To store a column vector into variable

ΣDAT use function STOΣ, available

through the catalog (

‚N), e.g., STO

Σ (ANS(1)) in ALG mode.

Example 1 – Using the program LXC, defined above, create a column vector
using the following data: 2.1 1.2 3.1 4.5 2.3 1.1 2.3 1.5 1.6 2.2
1.2 2.5.

In RPG mode, type in the data in a list:

{2.1 1.2 3.1 4.5 2.3 1.1 2.3 1.5 1.6 2.2 1.2 2.5 }

`@LXC

Use function STO

Σ to store the data into ΣDAT.

Note: You can also enter statistical data by launching a statistics application
(such as Single-var, Frequencies or Summary stats) and
pressing

#EDIT#. This launches the Matrix Writer. Enter the data as you usually

do. In this case, when you exit the Matrix Writer, the data you have entered is
automatically saved in

ΣDAT.

Calculating single-variable statistics

Assuming that the single data set was stored as a column vector in variable

ΣDAT. To access the different STAT programs, press ‚Ù. Press @@@OK@@ to
select

1. Single-var..

There will be available to you an input form labeled

SINGLE-VARIABLE STATISTICS

, with the data currently in your

ΣDAT variable

listed in the form as a vector. Since you only have one column, the field

Col:

should have the value 1 in front of it. The

Type

field determines whether you

are working with a sample or a population, the default setting is

Sample

. Move

the cursor to the horizontal line preceding the fields

Mean

,

Std Dev

,

Variance

,

Total

,

Maximum

,

Minimum

, pressing the

@ CHK@ soft menu key to select those

measures that you want as output of this program. When ready, press

@@@OK@@.

The selected values will be listed, appropriately labeled, in the screen of your
calculator.

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