Casio fx-9750G PLUS - Manual (Page 315)

287
µ
1
G
µ
2
.............. direction of test
t ...................... t value
p ..................... p-value
df .................... degrees of freedom
o
1
.................... sample 1 mean
o
2
.................... sample 2 mean
x
1
σ
n -1
............... sample 1 standard deviation
x
2
σ
n -1
............... sample 2 standard deviation
n
1
.................... sample 1 size
n
2
.................... sample 2 size
Perform the following key operations to display a graph.
J
ccccccc
6 (DRAW)
The following item is also shown when Pooled = On.
x
p
σ
n -1
............... pooled sample standard deviation
u u u u u
LinearReg t Test
LinearReg t Test treats paired-variable data sets as ( x , y ) pairs, and uses the
method of least squares to determine the most appropriate a , b coefficients of the
data for the regression formula y = a + bx . It also determines the correlation
coefficient and t value, and calculates the extent of the relationship between x and
y .
b =
Σ
( x – o)( y – p)
i =1
n
Σ
(x – o) 2
i =1
n
a = p – bo t = r n – 2
1 – r 2
a : intercept
b : slope of the line
Perform the following key operations from the statistical data list.
3 (TEST)
2 ( t )
3 (REG)
Tests
18 - 6