Casio fx-9750G PLUS - Page 315

287
µ 1G µ 2 .............. direction of test
t ...................... t value
p ..................... p-value
df .................... degrees of freedom
o1 .................... sample 1 mean
o2 .................... sample 2 mean
x1 σ n-1 ............... sample 1 standard deviation
x2 σ n-1 ............... sample 2 standard deviation
n1 .................... sample 1 size
n2 .................... 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.
xp σ n-1 ............... pooled sample standard deviation
uu
uu
uLinearReg 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