Casio ALGEBRA FX2.0 Advanced Statistics Examples 1 - 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