HP 48gII User Manual
Page 617
Page 18-46
variance, test the hypothesis H
0
:
µ
1
−µ
2
=
0, against the alternative hypothesis,
H
1
:
µ
1
−µ
2
<
0.
Press
‚Ù—— @@@OK@@@ to access the hypothesis testing feature in the
calculator. Press
—@@@OK@@@ to select option 6. T-Test: µ1−µ2.: Enter the
following data and press
@@@OK@@@:
Select the alternative hypothesis
µ1< µ2, and press @@@OK@@@. The result is
Thus, we accept (more accurately, we do not reject) the hypothesis: H
0
:
µ
1
−µ
2
=
0, or H
0
:
µ
1
=µ
2
, against the alternative hypothesis H
1
:
µ
1
−µ
2
<
0, or H
1
:
µ
1
=µ
2
. The test t value is t
0
= -1.341776, with a P-value = 0.09130961, and
critical t is –t
α
= -1.659782. The graphical results are:
These three examples should be enough to understand the operation of the
hypothesis testing pre-programmed feature in the calculator.