Casio ALGEBRA FX2.0 Advanced Statistics Examples 1 User Manual
Page 17
17
examples
○ ○ ○ ○ ○
Example
A survey conducted by a city on its real estate investments revealed
the following data on the relationship between area and price.
Does the data indicate that the value
β
1
, that is, the slope of the popula-
tion regression line, is not zero, which would mean that
x
(Area) can be
use as a predictor of y (Sales Price)? Use a 5% level of significance.
Procedure
1
m
STAT2
2 j
wbfwbawbbwbaw
e
dg
wiaweewffwdfw
3
3
(TEST)
c
(T)
d
(LinReg)
4
1
(
≠
)
c
1
(LIST)
b
wc
1
(LIST)
c
wc
1
(1)
c
1
(None)
c
5
1
(CALC)
Result Screen
Since P = 6.4531e-3 < 0.05 (level of significance), we can reject the null hypothesis
β
1
≠ 0
and conclude that there is a linear relationship
y
=
β
0
+
β
1
x
+
ε
between area(
x
) and price(
y
).
x Area (square feet)
9
15
10
11
10
y Sales Price (
Ч
$1000)
36
80
44
55
35