20090601
k
t
Test
1-Sample
t
Test
Menu: [Test]-[One-Sample TTest]
Description: Tests a hypothesis relative to a population mean when population standard
deviation is unknown. A 1-Sample
t
Test is used for
t
distribution.
o
: sample mean
ƫ
0
: assumed population mean
s
x
: sample standard deviation
n
: sample size
Definition of Terms
ƫ
condition : population mean value test conditions (“
≠
” specifies two-tail test, “<”
specifies lower one-tail test, “>” specifies upper one-tail test.)
ƫ
0
: assumed population mean
List : data list
Freq : frequency (1 or list name)
o
: sample mean
s
x
: sample standard deviation (s
x
> 0)
n
: sample size (positive integer)
Calculation Result Output
ƫ
≠
11.3 : test condition
t
:
t
value
p
:
p
-value
o
: sample mean
s
x
: sample standard deviation
n
: sample size
Example 1 (calculation with list)
List : { 330, 240, 260, 390, 400, 360, 200, 180, 300 }
Assumed population mean : 250
• Statistics Wizard Operation
(1) Input the data into [list1] in the Stat Editor.
(2) On the menu bar, tap [Calc] and then [Test].
(3) Select [One-Sample TTest] and [List], and then
tap [Next >>].
(4) Select the
ƫ
condition [
≠
] and input
ƫ
0
250.
(5) Select List [list1] and Freq [1].
(6) Tap [Next >>].
t =
o
—
0
n
s
x
t =
o
—
0
n
s
x
7-9-8
Tests
