Sharp OZ-707 Operation Manual - Page 48

°C.

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Obtaining statistics Press the [}:::J key on the two-variable submenu to display the r n analysis submenu. There are two submenus, pressing the or m key toggles the submenu. (The symbol tor' will appear.) When the [}:::J key is pressed in the two-variable submenu, (The first analysis submenu) ANALYSIS C:r, '::I) 3l '; n i:x 2 4; t 'J'-':x 5: =.l: 6: 0';:[ 7:!-:a :::: :Z;y2 SELECT t..fo. .? rn (The second analysis submenu) SELECT ~40. .? r n Pressing the key will display the first analysis submenu. Example: The following table lists the dates (April) on which migratory birds fly through a certain district, versus the average temperatures in March of the same district. From this table determine the coefficients, a and b, of the linear regression line, y = a + bx, and correlation coefficient r. Estimate the date of migration when the mean temperature in March is 9.1°C. Also estimate the mean temperature in March if the date of migration is April 10. Year 123 45678 Mean temp. (x°C) 6.2 7.0 6.8 8.7 7.9 6.5 6.1 8.2 Date of migration (y day) 13 9 11 5 7 12 15 7 Select "2. TWO-VARIABLE" in the STAT menu. LIJ FUNCTIONS (x, ':I) 1. INPUT 2. DELETE 3. ANAL'''SIS 4. PRINTER :3ELECT t·40. ? 84 Select "1. INPUT" and enter the data.. c:o 6.2 1ENTER 113 1ENTER I 7.0 1ENTER 19 1ENTER I 6.8 1ENTER 111 1ENTER 18.7 1ENTER 15 1ENTER 1 7.9 1ENTER I 7 1ENTER 16.5 1ENTER 112 1ENTER I 6.1 1ENTER I 15 1ENTER I 8.2 1ENTER I7 1ENTER I '::1=7 6:x=6.5 '::1=12 7:]::=6.1 ':1=15 B:::r=8.2 '::1=7 9:]::=_ Data entry is now complete. Display the two-variable submenu. IENTER I Select "3. ANALYSIS" and display the second analysis submenu. m [}:::J Determine coefficient a. CD ANALYSIS (x,':I) - a'::I 4: 1: 3: ';'r~ s~ --:;': 4 5:0. 6:b 7:r 8:x' 9:':1' a= 34.44951017 Determine coefficient b. CD Estimate the date of migration. CD Enter the mean temperature. 9.1 1 ENTER I Display the second analysis submenu. IENTER I b=-3.425018839 At..fAL'l:=;IS (]::, ';:I) ]::=- ANALYSIS (]::,y) x=g 1 . .;,,; 3. 281 ::::38734 ]::=- (Estimated date: April 3) 85

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Obtaining statistics
Press the
[}:::J
key on the two-variable submenu to display the
analysis submenu. There are two submenus, pressing the
rn
or
m
key toggles the submenu. (The symbol
tor'
will appear.)
When the
[}:::J
key is pressed
in
the two-variable submenu,
(The first analysis submenu)
ANALYSIS
C:r,
'::I)
l'
n
'J'-':x
3;
i:x
2
4;
t
5:
=.l:
6:
0';:[
7:!-:a
::::
:Z;y2
SELECT
t..fo.
.?
rn
(The second analysis submenu)
SELECT
~40.
.?
Pressing the
rn
key will display the first analysis submenu.
Example:
The following table lists the dates (April) on which migratory birds fly
through a certain district, versus the average temperatures
in
March of
the same district. From this table determine the coefficients,
a
and
b,
of the linear regression line,
y
=
a
+
bx,
and correlation coefficient
r.
Estimate the date of migration when the mean temperature
in
March is
9.1°C.
Also estimate the mean temperature
in
March
if
the date of
migration
is
April
10.
Year
1
2
3
4
5
6
7
8
Mean temp. (x°C)
6.2
7.0
6.8
8.7
7.9
6.5
6.1
8.2
Date of migration
(y
day)
13
9
11
5
7
12
15
7
Select
"2.
TWO-VARIABLE"
in
the STAT menu.
~----------------~
LIJ
FUNCTIONS
(x,
':I)
1.
INPUT
2.
DELETE
3.
ANAL
'''SIS
4.
PRINTER
:3ELECT
t·40.
?
84
Select
"1.
INPUT" and enter the data..
c:o
6.2
1
ENTER
113
1
ENTER
I
7.0
1
ENTER
19
1
ENTER
I
6.8
1
ENTER
111
1
ENTER
18.7
1
ENTER
15
1
ENTER
1
7.9
1
ENTER
I
7 1
ENTER
1
6.5
1
ENTER
112
1
ENTER
I
6.1 1
ENTER
I
15
1
ENTER
I
8.2
1
ENTER
I
7 1
ENTER
I
Data entry
is
now complete.
Display the two-variable submenu.
I
ENTER
I
'::1=7
6:x=6.5
'::1=12
7:]::=6.1
':1=15
B:::r=8.2
'::1=7
9:]::=_
Select "3. ANALYSIS" and display the second analysis submenu.
[}:::J
m
Determine coefficient
a.
CD
Determine coefficient
b.
CD
Estimate the date of migration.
CD
Enter the mean temperature.
9.1
1
ENTER
I
Display the second analysis submenu.
I
ENTER
I
85
ANALYSIS
(x,':I)
1:
';'r~
--:;':
4
3:
s~
-
4:
a'::I
5:0
.
6:b
7:r
8:x'
9:':1'
a=
34.44951017
b=-3.425018839
At..fAL'l:=;IS (]::,
';:I)
]::=-
ANALYSIS
(]::,y)
x=g
1
.
.;,,;
3.
281
::::38734
]::=-
(Estimated date: April
3)