lower limit and an equal chance for it being greater than the upper limit. So
you shall use 0.025 and 0.975 as arguments in two subsequent calculations
using the inverse cdf to get both limits.
If you cannot live with these chances, inevitable as they are, employ an higher
confidence level.
Turn to a good statistics textbook for more information, also about the terminology
used and the particular distributions provided.
MATRICES
Numbers arranged in a flat grid like in a table are called matrices by the mathemati-
cians. If you do not know matrices, feel free to leave them aside you can use your
WP 34S perfectly without them.
Else please note your WP 34S features a set of operations for adding, multiplying,
inverting and transposing matrices, as well as for manipulating rows in such matrices.
In general, the respective commands are building blocks designed to provide the low
level support routines for creating more useful matrix functions as keystroke pro-
grams. I.e. they represent the basic linear algebra subprograms of the WP 34S ma-
trix support. There are, however, also functions featured for computing determinants
as well as for solving systems of linear equations.
A matrix is represented within your WP 34S by its descriptor, formatted bb.rrcc
with
rr being the number of its rows and
cc the number of its columns. Thus the matrix has rr × cc elements.
These elements are stored in consecutive registers starting at base address
|bb| . See below to learn about the registers of your WP 34S.
Example: A descriptor 7.0203 represents a 2×3 matrix let us call it (M). As you
know, its six elements are arranged in two rows and three columns, and are num-
bered as follows:
The descriptor tells us now where to find the values of these elements:
m
11
= r07 , m
12
= r08 , m
13
= r09 , m
21
= r10 , m
22
= r11 , and m
23
= r12 .
If cc is omitted in a descriptor, it is set to rr so a square matrix is assumed. The max-
imum number of matrix elements is 100 it is the number of general purpose regis-
ters available. A vector descriptor looks like bb.01cc or bb.rr01 .
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