Casio fx-9750G PLUS User Manual Page 315

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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
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