E – 18
File name : CBM_SR285,A_HDBSR285T19_English.doc
version : 2010/04/26
Variable Meaning
t Test value
P ( t ) Represent the cumulative fraction of the
standard normal distribution that is less than the
value t
R ( t ) Represent the cumulative fraction of the
standard normal distribution that lies between
the value t and 0. R ( t ) =1 – ( t )
Q ( t ) Represent the cumulative fraction of the
standard normal distribution that is greater than
the value t Q ( t ) = | 0.5 – ( t ) |
Linear regression
Step : ( See Example 56. )
1. Based on the datasets in 2–VAR mode, press [ STATVAR ]
and scroll through the statistical results menu by [ ] or [ ]
to find out a, b, or r.
2. To predict a value for x (or y) given a value for y (or x), select
the x ' (or y ' variable, press [ ], enter the given value,
and press [ ] again. (See table below)
Variable Meaning
a Linear regression y-intercept ∑∑ −
=x
n
by
a
b Linear regression slope ∑∑
−
∑∑∑
−
=))x(xn(
)yxxyn(
b22
r Correlation coefficient
∑∑∑∑
−−
∑∑∑
−
=
))y(yn)()x(xn(
)yxxyn(
r
2222
x ' Predicted x values given a, b, and y vales
b
ay
'x −
=
y ' Predicted y value given a, b, and x value.
bxa'y +=
Correcting data
Step : ( See Example 57. )
1. Press [ DATA ].
2. To change x - values or the frequency of the x - value in
1–VAR mode ( or the corresponding y - value in 2–VAR
mode ), please choose
DATA
–
INPUT
. To change upper spec.